[nostrebored]

Maybe I'm biased -- my focuses in undergrad were on Theory and Modeling & Simulation -- pretty much I took a bunch of math and algorithms.

[Bahamut]

Undergrad is peanuts - nothing like the intensity you see in grad school, it is on another level. FWIW, I spent 4 years at UIUC for grad school (top 15 math, top 5 CS), and found that the CS PhD students in my math classes were quite challenged by the pace and coursework.