Lidstrom was amazing before 30 too, but the NHL didn't give him any props due to his non-physical defensive style.
Back then, defence was being tough, hitting, roughing someone up to get the puck, which was okay since it was allowed.
Lidstrom played elite defence for years WITHOUT all that, but was only looked on as a weak Euro.
Rhat was the stubborn NHL-culture's fault, not Nick's.
He absolutely was amazing before 30. I firmly believe he was a much, much better defensemen in his 30s, though. He was playing more minutes, putting up more points, had some absolutely ridiculous +- numbers, and was winning Norris trophies and championships... By every measurable variable, he was a better player in his 30s. Period.
His highest scoring seasons came at 35, 29, 30, 37, 25, 32, 36, and 40.
His highest plus-minus seasons were 23, 32, 36, 37, 31, 38, 25, and 27.
The argument isn't whether or not he was GREAT in his 20's. The argument is that he was even BETTER in his 30's. I'm not sure how you can argue he wasn't.
Were Bourque, Coffey, Leetch and MacInnis really know for being tough, hard hitting defensemen? I certainly don't remember them that way. Those were some of the guys winning Norris trophies when Lidstrom was in his 20's.