Don't worry, there are already a couple of those right here on this forum. Search for CigTech or GMC Denali, he made two separate reports on the Denali. I think he got one up to 14,000 miles or so before he crashed it and had the second up to 4,000 miles or so before he stopped reporting.
But yeah, I know what you mean, it would have been interesting to see...I just can't ever leave anything alone...
For what it's worth, my friends have left their Denalis completely stock and they aren't having any problems, and they are enjoying the bike.
And on that note, I won the ebay auction, soon my bike will have a Shimano Sora front derailleur. Brand new, 9 bucks shipped to my door. I figure for the most part an FD is an FD, as long as it fits, so Sora is good enough. And it will fit as, for lack of a better word, it's "flat" on the outside vs. my current one which has a protrusion near the bottom. That is where the crank was striking the FD.
.
.
.