As a real fan of raid farming who made 20k + with this and a blood dk each week in cata, I have to say that, unsurprisingly, you can't expect much any more.
Did a few tests, here are the results:
Black temple: 45 mins, 562 gold
Serpentshrine cavern: 32 mins, 255 gold
Hyjal summit: 40 mins, 295 gold
Sunwell plateau: 22 mins, 325 gold
Karazhan: 30 mins, 340 gold
Magtheridon's lair: 2 mins 30, 70 gold
Gruul's lair: 4 mins, 70 gold
Tempest keep: not tried, I can expect 25 mins (in my gear) and like 250 gold
Tried also some 80: naxxramas around 500 gold (excluding selling pets), ulduar always around 500, OS around 100, ToC around 150
Of 60 raids only aq20 (now renamed aq10) is still worth something, takes 4-5 mins like always and gives now 180 gold, was 340 before the nerf, so not nerfed much. Raids above like serpentshrine cavern used to give 1.800 gold before nerf, so they're very heavy.
If you want to solo raids for fun, you can do this stuff, doing all 70 raids you should spend a few hours for 2k gold, but if you're going for gold farming, you're better off soloing dungeons like halls of lightning and blackrock caverns over and over and vendor everything and auction the cloth or farming deepholm mobs with potion of treasure finding.