Let's compare Jorge with 4 catchers already in the Hall of Fame - Yogi Berra, Johnnie Bench, Gary Carter and Carlton Fisk.
Yogi Berra - over 19 seasons posted 285/348/482
Gary Carter - 19 seasons 262/335/439
Johnnie Bench - 17 seasons 267/342/476
Carlton Fisk - 24 seasons 269/341/457
Jorge Posada - 14 seasons 277/380/477
Over their respective careers, Jorge has posted a higher batting average, a higher on base percentage and a higher slugging percentage then Carter, Bench and Fisk, has a higher career OBP then Yogi, and compares very well with Yogi in BA and slugging.
Yogi - 9 times 90+ RBI
Bench - 7 times 90+ RBI
Carter - 5 times 90+
Fisk - 2 times 90+ RBI
Posada - 5 times 90+ RBI
Assuming health and considering the Yanks' strong lineup, I see no reason Jorge won't equal Bench's 7 years of 90+ RBI, and currently is equal to Carter and beyond Fisk in this category.
Yogi - 358 HR (18.84/season)
Bench - 389 HR (22.88/season)
Carter - 324 HR (17.05/season)
Fisk - 376 HR (15.66/season)
Jorge - 221 HR (15.78/season)
While Jorge has plus power for a catcher, his HR numbers are not quite as good as Yogi, Gary Carter or Johnnie Bench.
All things considered, Jorge either compares extremely well or surpasses the credentials posted by the 4 other Hall of Fame catchers listed here. Jorge is certainly no Yogi Berra, but his numbers are certainly every bit as good (better!) as Carlton Fisk and Gary Carter. Considering that Jorge currently owns 4 (and will shortly be fitted for his 5th!) World Championship rings, his induction 5 years after retirement should pretty much be a no-brainer.