I wouldn't call myself fluent. I studied the language for the maximum time at college (4 semesters, spread out over three years for me because of study abroad), and spent two months in the Gaeltacht practicing at An tAcadamh through NUIG. I've also kept practicing with native speakers outside of that, and would love to get my masters in Irish (if I get it funded). I would say I'm comfortable, but I don't think my vocabulary is big enough yet, and, while I can read/write in advanced structures, speaking them really isn't as easy yet.
Edit: And this is all my guess; I haven't taken the TEG, but I'd put myself at B1/B2 level. Also, my reading and writing isn't as fluid as I'd like it to be (Gramadach na Gaeilge is used a decent amount, as well as dictionaries), though my listening is improving greatly with targeted practice.