It is easy to be cynical but recovery is tough work.
The proof, as others point out, is if this awakening lasts and he can continue to heal and heal his relationships with others. That is a process. If he is determined to succeed than I believe people can work miracles.
I'll admit though, the spiritual awakening thing throws me a bit because I am not religious but if it means 'seeing the light' and staying sober then all the better for him right? It is what follows that will tell you if he is truly wanting to work at this and heal the damage he has done.
There is no point in any 'awakening' if you don't put it into practice, and live that life of self awareness both in word and deed.