What's your data again? Your link shows this IP address was active since October, transmitting coinbase transactions rather often. As for the transmitted blocks, I can only see these several ones:
http://blockchain.info/blocks/93.174.55.27.
Oh, OK, I see the rate of coinbase transaction from there somewhat improved. However, I only see 57 on the first two pages, from 10 Dec till today. Not too insane (you said it was 80 in 3 days). It could be a pool machine though.
Also, the latest bitcoin block rate jumps are well within the expected variability. Nothing out of the ordinary yet.
today is 23th , i said 80 on 21th. it slowed down a little, and remember "only 57" is still number two force after the biggest pool.
i couldn't be a pool machine, because pool chart is in sync with pools stats on their webpages - 100% of this blocks are clasified unknown origin.
its impossible to run unknown dark pool that would be number one from the start.
Ok, i agree i still do not have 100% proof, and I hope I'm wrong. only 100% proof would be sustained 6T rise in network hashrate - but if this stops, it would be impossible to notice.
still no one is able to explain such big numbers of blocks found by one unknown ip. this is serious power of 9000 hi-end radeons. impossible to make without a truckload of asics.
