I think the riding weight test thing is a valid idea, as is any objective gathering and presentation of data. But I've mostly appreciated this thread because of the careful documentation of each and every part removed, its weight, and if anything special had to be done (such as with removing the starter). Rider impressions and so forth, while generally predictable for a lighter weight bike don't mean as much to me. The only opinion that matters to me on whatever mod I do to my bikes or whatever bike I ride is my own opinion.
I mainly read these threads to get information on something, and much less to comprehend and especially worry somebody's subjective opinion. When I read that someone rides "gnarly" singletrack or hillclimbs, it means nothing to me unless I can ride the same piece of earth and judge it myself. Even a GoPro
doesn't usually provide an accurate enough depiction of how truly gnarly or steep something can be. Even sitting in the stands at something like an Arenacross event doesn't really give you an appreciation for how deep the whoops are or how steep the faces of the jumps are - you have to ride it to really understand.
On the other side of this, is you can ride through, over, or up something and feel like a total badass, because it was actually difficult and required skill. But someone can watch or film from the sideline and it doesn't look that impressive sometimes.
Then you watch footage from Erzberg/Roof of Africa/Six Days hard enduro stuff and develop a true appreciation for what a pro can do on a dirt bike.