brooklyn/arebelspy et al, my admittedly unscientific reasoning for this is based upon reading the posts of our fellow MMMers. I don't see a whole lot of inflation in this bunch. In fact, some people are managing to lower their spending every year, or at least hold it constant. I know that this isn't indicative of inflation/deflation per se, but it does demonstrate better price sensitivity in this community (as noted above).
I think a Mustachian will be much quicker to react to high inflation with lifestyle changes. For example, a bunch of us have been talking about steak recently and for better or worse (I'd say for worse), beef prices are linked to oil prices. So, if the price of oil jumps up again, causing steak to do so as well, I bet the people here will cut back on it more readily than the vox populi.
Again, I know that's unscientific and more representative of our collective flexibility to roll with the punches, but I do think it is germane to the discussion.