Its both larger than SF and growing faster than SF. The economy of the bay area is bigger than just software engineering. If this statistic is to be believed, information technology jobs in the bay area only account for 6% of the job market anyhow (1), although they make up the vast majority of the job related headlines for the bay area I am sure.
[citation needed]
IIRC Google halted their SJ mega-campus plans, are there any other major moves happening?