Thanks for the report Meli.
It appears as if there have been considerations around dedicated spaces, folding seats, and better signage.
To your point about public support, I've sent BART an email, offering them to join our conversation on Neighborland (I sent them a direct link). Perhaps they can field questions, offer rationale to their decisions, and inform us of future plans.
I hear you. There's definitely not a lot of time to get on/off. That said, it's already happening. People are managing to bring their bikes on BART amidst a sea of non-bikers. I'd argue that by "segregating" those of us on bikes, the process may in fact be faster.