Citra sunnyvale 1BR went from 1500 to 2000 in a year
archstone santa clara 2BR went frpm 1700 to 2500 in a year
The average starting salaries for new grads at my company is also up by 15K from when I joined around 2008. This has been done to compete with offers from goog, aapl etc. So the new renters entering the market can afford 2K rents for 1BR and there are not that many "nice" places to rent from. As a result the avalons, archstones, north parks are making hay while the sun shines.
from my personal experience in some popular places that are livable south bay rents are definitely up since 2009. Average 2br used to be 1700 now its 2400. 3 brs are close to 3000 they used to be 2400.