Jinxboy, in my case that's correct.
My Adsense stats (the poor they may be) are in US$.
But since I have a regular Dutch bank account,
the money shows up in Euro.
For the past 18 months I have hoped for the US$ to gain a bit, preferably to at least a level where 1 US$ = 1 Euro.
For us europeans that would mean about a 25% rise in earnings (if all other metrics stay the same).
I alway make an estimate at the end of the month: how much Adsense cash will appear on my account this month? I believe the average exchange rate for the past few months was about 1 US$ to 0,78 Euro. But Google always pays me a bit more, as if the exchange rate was a bit better, more like 1 US$ to 0.80 Euro. So I don't have complaints.