I know that it's Montes houseruled 3rd edition game, but it definitely sounds like most of the ideas (in some form or another) will also be in 4th edition. (His previous post on his house rules also speaks about "20 spell levels")
Since I think that Monte is one of the best designers around, I think that indicates that the guys at WotC are pretty good, too. Now, it's entirely possible that Montes implementation of the same idea are great and the WotC designers implementation is bad. But I doubt it.
It doesn't come as a surprise to me, either. I noticed that a lot of D&D 3rd and 4th edition designers think alike and see similar problems and similar solutions.
As always, your mileage may vary.