Mine came back about 8 weeks post treatment enough where I could eat real food again and have the PEG removed. I would say 6 months post RAD everything tasted about normal. I still can't do anything spicy, or with a lot of vinegar, and I have to drink my red wine after I eat or before, but not with food.

DX on 05/01/06 with SCC of right tongue. 05/11/06 surgery-tumor 1.2cm & 4 cm clear margins & parital glos. & neck dissection with removal of 34 nodes/1 positive at 4mm)T1N1MO
35 IGRT & 3 cycles of chemo (1 cisplatin & 2 carbo-complete on 8/9/06.