perhaps specifically listing 45/45 or 90/30 would encourage more people to play these time controls on the internet. but I doubt it. most people who play slower time controls on the internet play with people they know and arrange it ahead of time. these time controls can be manually created with the "custom" function. it'll show up on the graph, anyone who sees it can click it.
besides the obvious fact that most people don't want to commit to a game of that length on the internet, there's the additional factor of there being much higher risk of foul-play in regards to playing longer time controls on the internet with people you don't know.
I prefer 5/2 over 3/2 and 25/5 over 30/0.
I would also like to see: 30/30, 45/45, and 90/30.