I had to try this out. I wet aged 2 pieces of backstraps (about 2.5 lbs each) from a mature buck we killed last year. Total wet age time was 21 days. I had thawed them, vacuum sealed, and then removed, dried and re-vacuum sealed on days 8 and 16.
I cut the loins into 1 3/4" thick filets. One set of filets I marinated for about 10 hrs in a soy mixture, the other set I simply treated with a basic rub at time of cooking (salt, pepper, garlic powder, chili powder). I cooked them for about 8 min on the grill turning once aiming for medium rare and pretty much nailed it. They came out quite nice. Son-in-law (who appreciates well prepared meats) was duly impressed.
I can't say if they were more tender than they would have been, but they were good tasting pieces of meat. I don't think a non-hunter would have been able to guess that they weren't beef.
Thanks for sharing the link and introducing me to wet aging.