UCLA not well known for CS? According to this ranking, which I believe is the official US News ranking, UCLA is (tied for) #13:
(That URL is a little strange, but I think it’s the official US News rankings.)
Michigan is also tied for #13; Purdue and USC are tied for #20, and RPI is at #52. These rankings are for grad school, but it gives you at least some idea how the departments are perceived.
Not trying to say this is the One True Ranking – or that you should worry that much about rankings in general – but it’s at least one very well known one that rates UCLA highly.