I know a lot of people who have left Goldman, etc. in the past few months, specifically for tech jobs. It's because 2011 bonuses were utter crap. (and it is toxic I'm sure, but the $ was the main thing)
Also several have said they'd apply to YC (they have money, but not startup industry connections, or at least not current ones). Remember, the deadline is March 28th...
I'm pretty sure that after working for Goldman, you don't go work for another large bank, you go work for the Goldman of another field. Otherwise it would be like going from MLB to a farm team -- not an upward move.
>specifically for tech jobs
Which kind of tech jobs? For banks, or something unrelated?