Dublingrad, i don't think you have anything to worry about. People talk about RCSI and Trinity more because those just happen to be the ones that are more well known. Kind of like in the US how some people are like "huh??" at Case Western, while others are like "oh, great school." UCD is a very fine school. There's essentially no difference in terms of educations and standards between any of the Dublin med programs. Probably not among any of the Irish schools either, but I only know about the Dublin ones. I haven't looked at figures yet, but yeah it's probably a little less expensive than Trinity and a lot less expensive than RCSI. I'm not sure if UCD is hooked to any particular association in the US, I know that Trinity is very well associated with the american pediatrics association (I think that's what they're called, my old pediatrician told me about it and encouraged me to apply to TCD because of it).
Atlantic bridge doesn't promote any of the colleges more than the others. It just offers the programs on the website without any bias. As for USMLE, NONE of the Irish schools gear north american students for it. All those wishing to practice in the US must study for it on their own.
Differences between TCD and UCD....in terms of med ed, not a whole lot. The setting itself...well, TCD is older...the oldest college in the Republic of Ireland and modeled off Oxford/Cambridge. Therefore, the school itself has a lot of history and tradition, and cool buildings/classrooms that make you feel like you're in a 1920s movie setting or something. The gym facilities SUCK, but they're planning a renovation in the near future. It's mainly famous because of humanities (classics, English, drama) and have produced famous authors/playwrights. However, it does get a lot of attention as a research university and science facilities are good there, even among older buildings (you'll have anatomy in an old building but then science labs in a relatively new building). Computer access is terrific.
UCD is not as aesthetic as Trinity, but might have more modern facilities. I bet Dublingrad could tell you more! The gym facilities are definitely WAY better than Trinity's at the moment, and is not such an "old boys" school. UCD's fame lies in its business/economics, and social sciences...but again, the med program is excellent and respected as well. Although Trinity requires more leaving cert. points (that Irish secondary school students have to take), both med programs take only the ones with very high marks.
That's about all I can tell you unless you ask specific q's. hehe but UCD is in for a good arse-whippin' at this year's Colours boat race :wink: .