TFL would claim that, wouldn't they? Your initial argument was that Oysters reduced overcrowding. But wasn't the congestion charge supposed to encourage more people to use public transport?

I've already said I don't deny it's a bit quicker - just that if you put your ticket in the right way first time it's hardly that much quicker. And certainly not the reason why paper tickets increased in price to ?4 when Oyster fare stayed the same - apparently it was 'to fund improvements' (according to Ken).