I found some issues, which were solved very fast (big support).
As a reward i did send the dutch translation.
Also use Google Adsense Dashboard!
But I must say the performance has speeded up, more than the developer claims. I measured a 20% improvement in the latest release.
But it is as he says "may vary per server/setup"
I am sorry. The new version should reduce that speed improvement to 0% again.