I know you decided to delay your surgery but I just wanted to give a little info about my experience. In October of 2014 I had a mastoidectomy in torder to remove a cholestatoma in my left ear. Afterward, I lost taste in the side of my tongue opposite the operation. Luckily though, like @hadron said, it was temporary and came back about a month later with no issues since.
Now I'm one day BoneBridge implant post-op and cant wait to get this massive bandage off my head!
Best of luck,