According to Pingdom, performance in Europe is significantly worse than Stateside. Lets hope AdSense performs better. Beef up that European infrastructure Google!
And webmasters, make sure that script is at the bottom of your pages, not the top!
As you can see, loading the GA script from North America is overall a bit slower than loading it from Europe. On the other hand, while the European load times are significantly faster on average than the North American ones, the performance is much more uneven over the course of the day.
The difference between the maximum and minimum load times for North America is 27%, but in Europe the difference is 97%.