Re: [5000 Gh/s] DeepBit.net PPS+Prop,instant payouts, we pay for INVALID BLOCKS too

Maybe they already have it working and keep the coins now difficulty is still in the 23k.

No, hidden merged mining isn't possible. From last deepbit block (well, last published in stats - http://blockexplorer.com/rawblock/000000000000067ec6ceda3a41036012b2fc0e2839408f85348a270cda23bc2c) I see that deepbit isn't merged mining thus not hiding anything.