I haven't seen the review of the new 450, nor had a chance to get an upclose look at it, but here are my comments.
I think what bitchenbanshee is trying to say is that Honda has build their sport quads simple, smart and bulletproof. (the honda round style carrier for instance). Back in the 80's there was the 250R, the Banshee, and the quadracers. 250R's have stood the test of time considering Honda hasn't made them in 14years. Try and find a quadracer in good shape, there's not too many of them. Banshee's are a dime a dozen, they've been making them forever. Think about it, all the R's out there, winning races and they haven't been in production for 14years, that's a pretty impressive track record.
All the guys I ride with have 400ex's. These things are all tight, build solid. They handle well, fly well, and are very reliable. Nowhere near as fast as my shee, but definately the best built (not fastest or most powerful) 4 stroke out there.
You need to look at the little detail in the bike. The quality of the paint, welds, design. Look at the diameter of the bolts, placement of parts, and how the overall design works. We all could go on and on with the horrible designs built into the Banshee, the swingarm, the airbox, tors, the kickstarter, etc. I know it pisses us all off that Yamasuck doesn't fix these items. They don't want to spend the $ on new tooling costs and R&D, etc. The Banshee is a cash cow for Yamaha. They don't spend a dime on updates and still sell a boatload of bikes every year. Check out the way Honda builds theirs.
And as far as the 250R frame braking, I don't think Honda had 30' high jumps in mind when they built the thing, not to mention the frames are 14yrs old at best.
So, if Honda comes out with a more powerful bike, you bet they be all over the track taking 1st, 2nd and 3rd. I doubt they'll build the bike to be king of the dunes, it be the MX track and gncc they're after.