If Russian River is not experimental then what you really mean by experimental is wacky crappy beer. I can name a few of those breweries and agree DFH belongs on the top of that list.
Russian River constantly does new stuff that is good, stands the test of time, and is imitated by other brewers.
I think you are being argumentative. You are welcome to your opinion, but I think you are redefining the topic. Experimental would be considered brewing with ingredients or processes that are well outside the norm.
Russian river makes excellent IPAs, but they are not "experimental". They make a line of sour beers, but they are not "experimental". Yes, adding currants and fermenting in wine barrels isn't common, but I don't think this is pushing the envelope.
DFH is experimental. They use non-traditional ingredients (too much IMO).
For the record, I do think that RR could be the finest brewery in the country. I don't much care for DFH beers.