Who made
http://poolpicker.eu/ ?
If it's accurate the conclusion is: They're all about the same so just relax.

That would be me.

Nicely done. Everyone loves a horse race and I like that you kept it simple.
I'm wondering what your methodology is. I'm assuming that you just collect published data from each pool. It could be done with a carefully run mining setup too which would be another interesting approach. It would be nice to see a sentence or two on the page explaining it.
And maybe short essay somewhere with the details...

Thanks a lot
The way I do it is that I daily collect the stats for paidout/pool speed for each pool from their own stats page or api if available.
For middlecoin I just tap into my data collector that I use for
http://mc-watcher.eu and grab the stats from there.
I would have loved to have a mining setup to collect the data but that would be way out of my budget, and also a bit misleading depending on ping/different servers etc.
are you taking into account the large amount of BTC carried over every day on middlecoin? from people who arent paid due to being <.01.
also are you taking into account the ACTUAL time between payout? (1.023 days, 0.923 days, etc)
if both of these things are not acounted for, it will introduce significant error.