At the moment, yes, because there are a (relative) lot of games that publishers are willing to release here. As time goes on and the publishers have less old games to release, they'll probably not be as eager to release the newer ones that they still are selling in decent amounts on plastic disc.
3 years old seems pretty new to me (I think a couple 2006 games have been released here... granted, one was recently removed, but that's besides the point). Though the thing is, it's not what GOG go after (they want, and try to get, as many games here as possible, new or old), it's that publishers are less likely to let go of the newer games.

Well, then - the publishers will just have to change their minds :>.
GOG has a community that is willing to pay for something they have bought 3 times already and for things considered abandonware. It's our dedication to cheap, DRM-less games that will soon make a lot of publishers ponder the risks and the gains. In the end - if they are smart - they will just give up and admit that they have to do what WE want to get our money (and that we are generous people if treated the way we want).
Let's be honest - most of them are experimenting right now. They want to see if GOG will really earn them that much of a profit to "risk" resorting to DRMless online distribution. If we buy enough games here and refuse to buy them elsewhere - they will have NO choice but to sell it here or let our cash fly past them.

Eactly, but I'm not that cheap. Still, I feel so comfortable with it.
The last thing I need is to have Blood and Blood II and then I'll be having constant orgasm :)

That doesn't sound very pleasant... if it's constant.
Blood and Blood 2 and other Monolith games would be awesome on GOG. But I guess you'd have to ask GT Interactive and some other evil publisher for the rights, and that's always tricky.

Well, literarily.
Blood's been pushed around so much, they even forgot to release the source code. I guess they accidently flushed down the toilet. It would be great to have on GOG, ofcourse.