How much of that was the base pay? I received a Google offer as well a couple of years ago, with a very concrete salary and a very handwavy "and there are bonuses and stock". Did your offer actually spell out how much the bonuses and stock were worth, or did you only find that out once you accepted the offer?
Haven't accepted yet (deciding between Google and a "hot" late-stage startup). The rough breakdown is $115k salary with 15% bonus if I "meet expectations" (presumably more if I "exceed expectations") + about ~$400k in stock over four years. Add in a sign-on bonus and we reach the $240k average.