Absolutely - I remember when we had four 2-1 wins in a row, with late winners, in three of them, including that last minute Sterling goal at Southampton. But that run was in the middle of an 18 game winning streak in the league, and a run where the only defeat in 33 games was a dead rubber in the CL.The old truism about last minute winners being something champions do has always struck me as a bit of a cliché that hides as much as it reveals. It's equally likely something runners-up do because realistically those sorts of performances will catch up with you eventually.
Those Arsenal games against Villa and Bournemouth were injury time winners in far too open games, and they came shortly after a run of three defeats and a draw. Arsenal have now won 7 of their last 15 games in all competitions, suggesting they're symptoms of faltering form, not a team in great form that can dig out a win when needed.