I thought I'd chime in here with some stats.
I was mining RZR through a dedicated pool until it 'got popular'
then I had to go looking to find whoever was accounting for a large percentage of the network hash since my old pool wasn't finding any blocks.
no doubt there are some very large farms out there because I've looked at the block chain.
however what i find very interesting from a statisical standpoint and mind you - stat don't lie
Ipomiiner has 16% of the network hash and has found 15.6% of the blocks in the last three hours.
Coinking.io is advertising they had over 20% of the network has but only found 10% of the blocks in the same time periiod
things that make you go hmmmm...
keep up the great block finding Ipominer!