Half of the songs that I see rising on the radio chart the last few months I've already heard on Dutch radio for weeks...
It used to be the other way around... The US was usually first. Now Europe seems to be first with some hits.
Examples: Chasing the Sun, Titanium was already on the radio here half a year ago, Somebody That I Used To Know was half a year ago as well, I Won't Give Up a few months ago, etc.