I guess I'm not being analytical enough about it.
Bradley started 39 games after Rondo went out last year. If you're telling me he wasn't playing PG during those 39 games, or was thrust into some hybrid type of position that wasn't what he'd be asked to play under this years circumstances, then I suppose you have a point that "we" can't determine how he'll do running an offense under this years model.
To speak to your criticism of the analysis that started this back and forth, I can't condemn the analysis because it's simplistic or measured in some fashion to show every conceivable circumstance.
These guys TOV%, ASST% etc are what they are. Perhaps that's too "5000" feet for you or anyone to actually determine whether a player is more apt to be suitable for one position vs another. I thought (and think) it's an interesting glance at who's actually performed in certain areas you'd want a PG to excel at.
The beaten horse isn't quite dead yet.
So it's seek and yea shall find
I finally was able to find position stats for 12-13 via 82games.com (I like the site but it's tough going sorting through all of it sometimes)
Here's the link to Team Production by position from last year
http://www.82games.com/1213/1213BOS5.HTMHow to see the individual's from last years roster.
http://www.82games.com/1213/1213BOS.HTMHere's the link to Bradley from last year.
(His "By Position Stats are about 1/2 way down.)
It lists him as spending 29% of his 36% of floor minutes at the PG position so, according to them, he was playing PG the majority of his 50 odd games (exactly HOW they make that determination, I don't know if they watch game films or just make assumptions...they have a pretty good rep so I'm assuming they know what they're talking about...assuming, assuming).
http://www.82games.com/1213/12BOS2.HTMPeople can look at for themselves and judge his performance but I'll just cherry pick his PER (Love it/Hate it, a lot of folks give it credence when evaluating OFFENSIVE #'s) @PG was 8.5 (Avg is 15). It was 9.8 @pg the year before.
For some context,
Rondo's PER for PG was 18.5
Terry's PER for PG was 14.6
Lee's PER for PG was 14.7 (miniscule sample size)
Crawford's PER for PG 14.6 (Miniscule Sample again)
Overall team PER for PG 14.9
Anyways, anyone's that interested can go to those links and do your own comparison that's (supposedly) more Apples to Apples.
Laa-dee-daa