Shaq and Wilcox weren't really "post up bigs" when they were on the Celtics though. Going back a little futher, Sheed was/is probably the best post player that Rondo's every played with, but he didn't spend much time in the post either.
Shaq was clearly a post up big, although he was more of a "finish the easy pass with a layup/dunk" player on the Celts. Eddie was talking about how hard it would be for those bigs that played inside to score with Rondo on the court but when the situation actually occurs you tend to see historically high fg% from the centers.
No, I think he's fine with a big who can finish around the basket. Rondo can penetrate and hit him with lobs or dump offs for easy shots. I'm more concerned with his ability to mesh with a back to the basket type player, where you'd have to hide Rondo on the weakside because you know the double is coming off his man.
I think you'd be hard pressed to start naming good low post players who can't finish around the basket and score well off of lobs and easy shots from dump off passes. In other words, as you seem to have figured out, he'd be fine with them.
There are many players (Big Al, Cousins, the Gasol's, etc.) that are very comfortable with their back to the basket and having the offense run through them either by scoring themselves or drawing a double. Judging by your comments, it seemed like you agree that Rondo would have difficulty meshing with these player types and you'd be willing to take away that aspect of their games and reduce them to simply playing off of Rondo. Since it's no secret that Rondo off the ball and playing off of players leaves a lot to be desired.
That's why I continue to harp that in order to build around Rondo you need players with very particular skillsets. Bigs who can finish off of lobs and have at least decent perimeter/catch and shoot games and wings who can move well without the ball, have good range, and are very adept at catching and shooting.
That's not what he's saying at all. He's merely playing along with and indulging your hypothesis, addressing it specifically to show that it's a non-issue if it were true, which it isn't.
In your hypothetical that Rondo would have problems with back to the basket type of bigs, all BballTim is saying it's a none-issue since they're also good at other things that Rondo complements well. And that the types of bigs that have had historically high FG% with Rondo did things that these back to the basket types of bigs also do well, or even better. So none issue.
But the fact is, that your hypothesis is inaccurate. Rondo has played with Kevin Garnett and never had a problem with dumping the ball to him in the post when Garnett was in position and asking for it. He never had a problem doing it with Leon Powe, heck he fed Kendrick Perkins regularly.
So, this hypothesis of yours is only true at the moment in the fantasy of your mind.