As of now there are 25 votes, with 13 votes favoring imperial (9 for current Wiki set, 4 for Abela's) and 12 favoring metric (8 for normal metric, 4 for my idea). This only after a few days, so I'd say that's not bad. I think if we get over 100 votes that might be something close to significant, perhaps. Poll is open for a month.
Some response to some comments:
Franco, thanks for the information. That bit of trivia about 1912 was interesting. Note however that I didn't say *solid* gold, so I think that my sentence is still accurate. There is, after all, at least some gold on the gold metals, making them at least partially made of literal gold.
To several that have pointed out different conditions and comfort and such, please keep in mind I am not suggesting (nor have I ever suggested) that UL backpacking is applicable to all types of outdoor recreation or even backpacking in general. I think this is a fairly simple and straightforward issue: UL as we are currently discussing (be it 5kg or 10lbs) in general is not applicable to everything. This is Backpacking Light, not Mountaineering Light or Outdoor Lake Ice Hockey Light other such more involved activities. As someone pointed out on reddit, having a 15lb base weight for deep winter camping one could call XUL.
Obviously if you need to account for safety, UL guidelines (and probably many other guidelines) go out the window. If you're going to be sleeping up on top of the Alps in the middle of winter, why, why, why would you entertain the idea of having a SUL BPW? UL on such a trip I personally think would have a pretty good chance of being foolish and/or dangerous.
Perhaps a notion or clarification ought to be added to say, the wikipedia article on ultralight about proper conditions (if there isn't one already there that I may have missed). When I think about the total sum of trip reports I see on this forum, and all the videos on youtube of UL backpackers I follow, there is a clear pattern. The majority (if not grand majority) of these trips are walks in nature, and mostly on marked trails. Some are in the desert (hi Nick!), some are in the woods (most of us maybe?), and most are during spring, summer, and fall--places and conditions where the weights in question are applicable. I thought that was understood, and hope it is now. "Backpacking" is a broad term, so it's worth pointing these issues out. And when it comes down to it, if you want to take 10kg base pack weight with you, take it. If you want to take 1kg, take it. Do what you think will make you the happiest and will also keep you safe and comfortable.
It's just that we, as a community of thousands of people, all have a collective experience that demonstrates that under the right conditions and locations, you can be just as happy, safe, and comfy with 5kg or even 2.5kg than what most traditional backpackers take (which is often double or even triple the standards of UL). There are even triple crown hikers that have pulled it all off UL. Being able to give a general set of guidelines that roughly communicate all this is valuable, not only for us, but perhaps even more importantly to others new to all this and need something more concrete first before moving into abstract "there are no UL weights, it's all in your mind" territory.