It's sincere, because he's always had this opinion and he's backed it in the past.
This is one thing that C1958 and I will have to probably agree to disagree on. Billy Smith was a rookie on an expansion team his first season, a near impossible situation for a goalie. He improved the next year with Potvin in the fold, but Potvin was also one of the team's worst minuses and highest PIM men...while Potvin won the Calder, fine, I don't necessarily suggest he's all that responsible for Smith shaving a whole goal off of his abacus...
Osgood just doesn't do it for me despite the win totals...didn't find him to be reliable, he was made possible by Lidstrom's greatness in my opinion.
Osgood also had an easier schedule than many 90's goalies because he was probably not seen as a value add like others...Osgood only pressed into 40 games with no days rest as a Red Wing...just 21-14-1, (40 GP - 0.538 pts%) 2.58 GAA...roughly 0.10 GAA less on 1 or 2 days rest, 154-74-36 record (0.626 pts%)
Generally less reliable goaltenders behind Lidstrom, handled no rest situations better (min. 15 GP)...
Manny Lagace - 12-3-2, 2.21 GAA
Jimmy Howard - 21-9-4, 2.28 GAA
Playoffs, 3 main goalies played behind Lidstrom...all three won Cups, all three with similar averaging stats...
Vernon - 30-12 2.08, .907
Hasek - 28-17 1.91, .919
Osgood - 67-37 2.02, .918
Iffy playoff tender in Hasek, rhythm, high-up, low-down, playoff tender in Vernon, no thrills goaltender in Osgood...all results are similar, common thread is Lidstrom (and company).