It's definitely the case for me too. I am using a T-Mobile MyTouch 4G.

There is something rotten with the cell phone networks in the USA because when I lived in Germany the situation was much better. Good to see my gut feeling being backed up by data. However, I thought the difference would be more than roughly 30%. Maybe the difference between T-Mobile USA and T-Mobile Germany is just bigger than the national averages of the two countries.