What does that have to do it?
One block found is one block found. If the pool size is 1, 10 or 1000.
The statistics (and maybe more) is simply wrong.
do you know what average means?
and as holiday said: 5 blocks a day: if you see that would you still say: wrong statistics?
as you are arguing about p2pool block finding rate p2pool size does matter. it only finds every 0.42days a block because of its size. if it is smaller the number raises...
EDIT: corrected an error
EDIT:
maybe its just a misunderstanding.
the average block-find-time is not for old blocks.
it just tells you how often to expect blocks.