With a couple of the Gooners going on about how they're on an amazing run and they're going to win the league, I just wanted to provide a bit of context.
This is their Prem record from the last 3 seasons (not inc. this season) (give or take 1 or 2 results that got a bit mangled):
Total
Pld: 114 W: 61 D: 27 L: 26 GS: 219 GC: 129 GD: +90 Pts: 210.
Home: Pld: 57 W: 34 D: 13 L: 10 GS: 119 GC: 54 GD: +65 Pts: 112.
Away: Pld: 57 W: 27 D: 14 L: 16 GS: 100 GC: 75 GD: +25 Pts: 95.
So not a lot of difference between home and away in terms of performance, but a pretty big difference in their defensive record, they don't score that many goals at home it seems.
Breaking it down here's their record against teams that finished in the top 5 with them in those seasons:
v Top 5 Total
Pld: 24 W: 7 D: 15 L: 12 GS: 35 GC: 39 GD: -4 Pts: 26.
Home: Pld: 12 W: 6 D: 2 L: 4 GS: 22 GC: 16 GD: +6 Pts: 20.
Away: Pld: 12 W: 1 D: 3 L: 8 GS: 13 GC: 23 GD: -10 Pts: 6.
So we can see that their major weakness is away at the other big teams, we'll come back to that later. Here's the record against teams who finished 6th-10th in the respective seasons.
v Top 10 Total
Pld: 30 W: 16 D: 10 L: 4 GS: 52 GC: 31 GD: +21 Pts: 58.
Home: P: 15 W: 6 D: 6 L: 3 GS: 20 GC: 13 GD: +7 Pts: 24.
Away: P: 15 W: 10 D: 4 L: 1 GS: 32 GC: 18 GD: +14 Pts: 34.
So a strength of theirs has been winning away against teams that don't challenge them for CL but finish in the Top 10, however they underachieve against them in the home fixtures. Here's their results for the bottom half of the table.
v Bottom Half Total
Pld: 60 W: 38 D: 12 L: 10 GS: 132 GC: 59 GD: +73 Pts: 126.
Home: P: 30 W: 22 D: 5 L: 3 GS: 77 GC: 26 GD: +51 Pts: 71.
Away: P: 30 W: 16 D: 7 L: 7 GS: 55 GC: 33 GD: +22 Pts: 55.
So they do well at home against bottom half teams but have a mixed bag away. Now onto the start of this season.
Their record is P10 W8 D1 L1 GS: 22 GC: 9 GD: +13 Pts: 25. Their home record is W4 L1 and their away is W4 D1. Of those 2 of their home games 2 have come against teams currently in the Top 5 (Spurs & Liverpool) and they won both, but they did ok against top teams in the last 3 seasons at home. They haven't played anyone 6th-10th, so their other 8 games have come against bottom half teams. So what we can see is that they are on a better than usual run against bottom of the table teams away from home, but let's extend this back to the start of this amazing run they are on, which started at home to West Ham in January.
Arsenal's Amazing Run
Total
Pld: 26 W: 20 D: 4 L: 2 GS: 52 GC: 19 GD: +33 Pts: 64.
Home: P: 14 W: 10 D: 3 L: 1 GS: 32 GC: 12 GD: +20 Pts: 33.
Away: P: 12 W: 10 D: 1 L: 1 GS: 20 GC: 7 GD: +13 Pts: 31.
v Top 5
Total: P: 4 W: 2 D: 1 L: 1 GS: 5 GC: 3 GD: +2 Pts: 7.
Home: P: 3 W: 2 D: 1 L: 0 GS: 4 GC: 1 GD: +3 Pts: 7.
Away: P: 1 W: 0 D: 0 L: 1 GS: 1 GC: 2 GD: -1 Pts: 0.
v Top 10
Total: P: 5 W: 3 D: 2 L: 0 GS: 10 GC: 3 GD: +7 Pts: 11.
Home: P: 3 W: 1 D: 2 L: 0 GS: 6 GC: 2 GD: +4 Pts: 5.
Away P: 2 W: 2 D: 0 L: 0 GS: 4 GC: 1 GD: +3 Pts: 6.
v Bottom Half
Total: P: 17 W: 15 D: 1 L: 1 GS: 37 GC: 13 GD: +24 Pts: 46.
Home: P: 8 W: 7 D: 0 L: 1 GS: 22 GC: 9 GD: +13 Pts: 21.
Away: P: 9 W: 8 D: 1 L: 0 GS: 15 GC: 4 GD: +11 Pts: 25.
Telling really. They haven't faced a top 5 team away or a top 10 team at all this season. In their run they have barely faced either and in their only away game against a top 5 side they lost and in the top 10 games again they've won just 1 out of 3 and have struggled overall at home to top 10 sides. What they've basically managed to do is maintain their home record (or slightly improve on it) against bottom half teams and improve a lot in beating them away, however they've only scored 15 goals in 9 away games with a number of 1-0's so sooner or later if they don't start scoring more it'll catch them out.
So in summary, on Arsenal's current run they've been in good form against the numerous bottom of the table teams they've faced, they've faced very few top teams and have hardly been tested in their weakest areas of results getting. It's a false record at the moment, if they start adding the big results to it then fair enough, but at the moment too many Gunners are shouting a bit too loudly and proudly about a run that really has been kind to them.