I am so sure of this because being at Amazon since April last year, I havent coded more then 700 lines of code, bulk of which was supporting new features in the already behemoth software.
I always wanted to work for a big company and I was super happy when I finally got a job offer but lately I have realized that the biggest downside of working for a big company is that you dont code, you just add features in to all the in use product, attend meeting and specific for Amazon, be on the pager 24X7.
For all you guys coming fresh out of colleges, head to bay area and join a start up, ditch these big companies.