It's insane. Personally, I don't think he'll quite get there but it's amazing for him to come to play in England and, as long as he gets one more goal, be on his own as setting the second most prolific season of any top-flight player ever.
If we look at minutes played per goal, purely in league matches (as I can't be arsed trying to dig out stats for appearances in other competitions), then I think that's the best figure to go by, even though football has changed so much that comparisons are slightly futile. I'm bored at home on a bank holiday, though, so I'll make them anyway! ;)
Dixie Dean played in 39 league games in his great season of 1927/28. There were no subs then so he presumably played the full 90 in every match, so he played 3,510 minutes in total and scored his sixty goals at a rate of one every 58.5 minutes. Dean's second best season was in 1931/32, when he scored 45 league goals from 38 games, which is one every 76 minutes.
The second best by anyone was by Pongo Waring of Villa, whose 49 league goals in 37 games in 1930/31 gave him a goal roughly every 68 minutes. And the only man to top forty in the top flight since WW2, Jimmy Greaves, scored his 41 league goals for Chelsea in 1960/61 in 40 appearances, which equates to one every 88 minutes. Erling this season has played 2,415 minutes in the league for City so far. He's scored 34 goals at a rate of one every 71 minutes.
I haven't checked so can't say for sure - maybe someone was top scorer one year and missed a load of games through injury. However, Erling at the moment is probably on course for the third-best ratio of minutes per goal in the top flight over the past century (there are one or two in the 1890s who probably better him as well, but I can't be bothered going back that far.
Shows what a phenomenal season he's having that you have to go back more than 90 years to find top-flight forwards scoring at similar rates. Mind you, Dixie Dean's record of 60 in a league season is a hell of a feat, and IMO is likely to prove unbeatable.
