could be quicker, but you have 50,000 iraq/afghan vets returning in the next year and 40k Vietnam vets still in the system since the agent orange presumptives changed last year. and since the new IDES system goes through the same VA as all of them, (and this is in my opinion only others may agree/disagree and I am no expert by any means as i am still at the start myself) its gonna get a lot slower. Now with PTSD/MDD your gonna have an intial rating and placed on TDRL anyway and be re-evaluated every 6 mos until "stable". So its almost best to be getting full pay and benefits and time in service while you wait for it to "stabilize" anyway.
As long as you are active duty, you will receive better care than you will through va/private channels and you wont have as many oppurtunities to " fall through the cracks" yes it may seem like your whole life is on hold, but better that then thrown to the civilian wolves that could care less about your issues.