If someone wants to compile a new kernel with the "fix" implemented, sure. You would need a class 6 sdcard to see any benefit from it though. The EVO guys are doing it and seeing numbers over 2000. There's no reason it wouldn't work. Though, you probably wouldnt notice any practical difference in the phone in regular use. I'm assuming the quadrant increase is due to the read write speeds being much higher using a card that fast, thus increasing the I/O score on quadrant.
What people don't seem to realize is that quadrant score is an average of the different tests, and not just a blanket score to use for comparisons...on the galaxy s it does fix the lag problem they have. Watch one do a quadrant test. The I/O test takes over a minute. A nice aide effect of the fix is that it inflates quadrant scores. The incredible is far from laggy, so you'd basically be doing it just to see a higher quadrant score.
You'd also have to figure out a way to use the Amon-RA recovery instead of clockwork, as only it can partition the sdcard in the correct way to implement this...
I'd actually love to see people try more things with the kernels, the ones we have are nice, but pretty basic. The EVO guys also have one that actively adjusts the cpu voltage based on speed and temperature, it's supposed to really increase the battery life. I guess that's probably due to the EVO not having the same supply shortages, and the fact they gave out a ton of them free to developers at the google conference, lol.