Is it more similar to CS in engineering acceptance rate or the regular LAS acceptance rate?
It should be slightly above 10% and higher than acceptance rate for CS in engineering. Please see the post below for details:
http://talk.qa.collegeconfidential.com/university-illinois-urbana-champaign/2040749-whats-the-acceptance-rate-for-stats-cs-at-uiuc.html#latest