I rarely ever meet someone who lets the time run out due a lost game, or leave a game without resigning in a lost game. Maybe you were just unlucky or in elo hell.
Not everyone remains seated after a finished game. Especially if those games had a decent time control: getting a drink, bathroom, you name it.
And on a side note, I barely ever rematch a guy which I lost to (although I do decline it). And I think more people think alike. If you do not want to wait any longer, just revoke your request and start a new one.
Really love this site generally, and since this is the first time I have ever really looked at this forum and posted forgive me if I am covering "old ground" for many of you, but I have a couple of pet peeves. First, why do so many people just quit on games when they know they are beaten? Is the ego so fragile that striking back by just waiting until the game is "abandoned" or time runs out is really that preferrable to resigning or allowing the inevitable checkmate? Then, after a game is over and I challenge to a new game why just sit remain on the page without either accepting or declining the invitation? Like I said, I generally love this site but those 2 aspects to it are really annoying.