Many of those reserves were/are decent players. You are going with top 10 games most games played. Isn't it likely:
1) an injury/foul trouble/ejection could have led to increased minutes in a number of games?
2) those players were "on" or "hot" for a number of games leading the coaches to make decisions to increase their play?
3) there was a situational match up?
4) many of the games were in garbage time of the year with starters sat? Looking at a lot of the dates for Miller, 6 were in April last season.
5) that those teams - especially because they were all division winners - were involved in numerous blowouts one way (losing) or more likely the other (winning)?
I'm sure we could both make pretty solid arguments on the playing time of the 9th or 10th. However, I am going to have to disagree with your regular season conclusion - much like you are going to disagree with my concusions... agree to disagree it is - lol.
Your point to when the minutes played is a good one but they still played the minutes. 82 games is a long grind for just 7 bodies. Again, I can't emphasis enough things definitely change come playoffs and my argument in regular season definitely doesn't apply to playoffs.
The majority of teams - including divisional winners - are 9-10 deep in the regular season, in my opinion. Factors leading to this in the regular season include match ups (Aaron Gray on a big body), injuries (please god nothing long term), foul trouble (Bargnani picked up his 3rd at the start of the 2nd quarter) or nights when a reserve is on (Amir going for 15/11). I think this bodes well for the Raptors this year.