I do believe this has been updated fast. However I have managed to get quite a few mods already working in 1.7.10 
appliedenergistics2-rv0-stable-8
CodeChickenCore-1.7.10-1.0.1.8-universal
gregtech-1.7
industrialcraft-2-2.2.496-experimental
Mantle_mc1.7.10_0.3.0
NotEnoughItems-1.7.10-1.0.2.15-universal
TConstruct_mc1.7.10_1.6.0d31
Thaumcraft-1.7.2-4.1.1.14(for some reason works :))
I'm looking forward to these updates because it's the only thing missing that I reeeeeeeally want added into 1.7.10