That is true, not many companies can deliver on a Google scale, and there was a good amount of risk that Google wouldn't have been able to deliver.

Maybe the risks that Google would not have been able to deliver on the scale that they have warrants a return of 400% over two years. However, I tend to believe that the market didn't perfectly understand Google's technology/market placing/placing/potential/strength of executive team/etc and low-balled the upside potential.