I'm a first-year (4 year program) at Jagiellonian, so perhaps I can help with class demographics/stats, etc. First off, our class has 35 students, which Newt mentioned was the cap. Most of my classmates' GPA's (assuming they're not lying) range from about 3.0 to 3.5 or so. As for MCAT, they range from rather low (24 or so) to pretty damn high (36 is the highest I've heard in our class). But like I said, this is mostly hearsay, so take it all with a grain of salt.
As for myself, I got in with no problems (stats: 3.3, 29).
I would re-iterate the above advice: call the school office. They've always been very helpful ... even when I paid my tuition over 3 months late.
One final bit of advice: apply early. As with any admissions process, the competition gets tougher as the clock ticks, so better to get your foot in the door earlier rather than later.
Good luck!