I have a feeling which community college you attend does make a difference.
Put it to you this way, at one of my former CC's ~5 students were admitted into UCLA. I'm going to assume of those 5, probably one was a science major (that school is big on churning out criminal justice, nursing, and poli sci majors). The vast majority of transfers did the CSU thing. Obviously this is not the case with say, an SMC, or a PCC...
Hell, in my own case, my GPA was about .4 above the average for admits, I'm an URM, first gen, low income, and had a fairly strong essay (my Bio prof from stanford helped a bit). My only problem was that I couldn't get one of my pre-req's done, because my school didn't offer it (O-Chem). I'm convinced it was due to this fact that I didn't get the acceptance.
My reasoning for this is that a good friend of mine with better stats than my own, (3.9, military service, similar background and major) was rejected the previous year as well. Like me, he did not have O-chem finished either.