At season's end, the best backup comparison sample for Brodeur since 1993-94 ends with the following breakdown:
Brodeur: 19-9-3, 2.42, .916, 28.8 SA/60
Backups: 32-18-1, 2.40, .918, 29.3 SA/60
I'll just let those numbers speak for themselves. It's not a huge sample size, but there was no major effect on either GAA or shots against without Brodeur in the lineup. Nor, for that matter, was there much difference in New Jersey's goal scoring or winning percentage with or without the "best goalie in the NHL."
I think the "Brodeur saves 5+ shots per game" crowd has been permanently and decisively disproven by this season's results. For Marty to play that kind of sample size and to face just 0.5 shots per game fewer than his teammates is pretty good evidence that the range of shots against is fairly narrow. I do think that the "true" shots against differential between Brodeur and Clemmensen is likely more than 0.5 shots per game, as Brodeur happened to be the man in net during New Jersey's late season swoon, but the results certainly are in line with my estimate of +/- 1 shot per game on average as the goaltender's effect.
I think there is a substantial difference between Brodeur and Clemmensen in skills like rebound control and puckhandling. However, there is not much of a net effect on the team as a whole because the rest of the skaters adjust their play at least somewhat to the particular goaltender. That explains why we don't usually see much of an impact in the shots against and GAA data from goalie to goalie.
I'm not going to go much farther than that in terms of assigning significance to these results. Brodeur is a better goalie than Scott Clemmensen or Kevin Weekes. The numbers may have been similar, but Brodeur faced more difficult shot quality against and likely was affected to some degree by his long injury layoff. I suppose this season supports my overall position on Brodeur, but it is by no means the main piece of evidence in the argument. The results do show fairly plainly that New Jersey is an easy place to play goal, but that should have been obvious to begin with.