@ebsclsgs My daughter attends one of the CC’s on your list and I’m familiar with and know kids attending each of the community colleges you listed except Diablo Valley and Canada.
Rather than consider a community college based on transfer rate, I suggest you select one based upon which community college offers the most courses that you need for your major at your target UC’s/CSU’s. Check out assist. org - http://www.assist.org/web-assist/welcome.html
College of San Mateo, DeAnza and Foothill are all known as very good community colleges and I know kids that have transferred successfully from each.