I've got a pair of Pums shoes, and the other week the greens were wet and my 16 stone weight were leaving whole foot print size mark in the green, that said it didn't take long for the gree nto spring back.
However, I'm of the opinion that once a green starts to allow indents from a player to be left behind the club should close the green and open the winter green instead. I'd rather play on winter greens while the season is over and let the normal greens a chance to recover so they are in optimal condition for the new season.