Another +25% diff increase is the nail in the coffin for home miners looking to profit (if it isn't completely dead already) without a new ultra efficient cheap home miner coming out on the market within the next 30 days or so (unlikely).
In the past year I've been home mining (plus small data center mining) for an average loss of 30%. In return I get freshly minted coins from Eligius or p2pool. Still beats going to shit places like Coinbase to buy your coins and have them track how you spend them. The S7 has probably allowed me to extend my home mining operation for another 6 months or so. As long as the loss is not too much I prefer to mine my coins rather than buy them.
If you had been mining at Kano for past year you would not be mining at a loss! Check the stats and you will see I'm right. The facts are easy to see. F2 after fees is just as bad as Eligius. Not to mention how bad they are for the long term health of the network.