Probably the best way to confirm any positional trends is to look at the evolution of road bike frame geometry. Not something I've really looked at in detail. Here in the UK, several experienced fitters have commented that many performance riders have a tendency to set their saddle too high (which may well force them into a more toe-down pedalling style). However, it is not clear how long this has been a trend since professional bike fits are a relatively new thing. Less saddle setback also appears to be a recent trend over the last few years, with more race bikes having zero-offset posts and relatively short-nosed saddles. But not all the pros are following that particular trend.