Don't be suck a fucking dick. The whole lot of you are being assholes. Too much time on our hands? As opposed to popping huge neck zits or sticking glass jars up our ass or ground up chickens or dickrolling the new guy? Whatever dude.
Unless something has changed in the last couple years Trillian always sucked ass. It never integrated with all the available features in the individual programs and whenever a change was made to any one of the messaging services it would stop working until a fix came out. I've never heard of Adium but unless they have some miracle product I'm going to guess it suffers from the same afflictions.
At least xentech made an effort at answering the question, and he's right to some extent. No one in Europe uses AIM. All the design and development people I have ever worked with use Skype and have headsets at the ready, the rest of society uses MSN.
What I don't agree with is this inability to change. It's only these two industries that seem to be stuck in the stone ages and unable to make the switch, which seems odd since they are ready to adapt at a moments notice to any other kind of situation in their businesses but continue to use the worst IM software on the market.