I agree with you Fast, but that's what attracted me to River Brain to begin with. I wiki style format, and well laid out interface allows the potential to create an amazing database of information. I think Colorado is actually is actually starting to get pretty respectable, though other regions are light.
Bear in mind that people River Brain has been getting legitimate use for a year, maybe two and AW has been around for a long time. AW data, as you note, is dated, and the gauge links are notoriously inaccurate. Compare that with River Brain. I just noticed this morning that the Boulder Creek Near Orodell gauge isn't working correctly, so took 2 minutes (a lot less time than I'm taking to write this) to use the gauge below it for the Boulder Creek runs and put the Orodell as a secondary gauge. That format makes it so easy to keep up with every changing river conditions as long as a few people keep their locals runs updated.
Personally, I tend to plug in a quick with little descriptive info when I see it missing so I can get it on my flows list, and then later as I'm checking out a run or after I do it or have some free time, fill out a more detailed run description.
For your example, the Golden Whitewater Park, I noticed earlier this year that it had only a terse description and filled in some information along with, I think, more useful info on flows and the one good hole than you'll find other places. Someone should upload a good photo - I don't have any - except the photo of me in there in Denver Post, but that seemed a tad too megalomaniacal.
I also think there's great value is getting some independent descriptions of runs out there to offer another perspective. We have WWSR and CRC, which are pretty awesome in terms of run info, but if the run info is thin in there, or you're looking for somebody else's perspective on the run, it can be hard to find. Eddyflower populated much of it's database with verbatim descriptions from the CRC, which is useful to have online, but doesn't offer you anything new.
The point I keep making, is if everyone just put in a good description of their local run on River Brain, we'd have a kick ass database of info exceeding anything else out there, almost overnight. In fact, sense it's unlikely anyone's going to listen to me, I should have spent this time filling in info about another run.
I can save you trouble looking up flows on River Brain, or anywhere else right now. The answer is, it's running, and it's awesome!