1/5 coverage = not really a problem in the cities unless you live out on the countryside.
3x as many dropped calls = widely exaggerated. dropped calls are very rare.
I live in Orange County, CA. I get 3G coverage just about everywhere. I just drove through the dessert 340 miles each way; I had 3G coverage the whole way with the exception of a small strip of highway (about 5 miles).
BUT I have close to 75% or higher call drop rate. Almost every call I make or receive gets dropped. But oddly enough, if I call back, it almost never drops the second time. Almost sounds intentional -- if it is important enough they'll call back then we won't drop them (the drop happens almost always at the 2 minute mark).