So I've been listening to this for almost a month (I got a promo version a few weeks back.
At first, like most people I suspect, I was pretty meh on the single. But within the context of the album, I quickly grew to love it.
As for the album itself, I listened, then I listened, and then I listened some more. I didn't 'love' it at first, but everytime Tempest was over, I found myself wanting to just start over. With 15 or so listens under my belt, I realize now that while I probably wouldn't have been drooling over this ten or fifteen years ago, Fear Inoculum is exactly the kind of album 40-year-old me didn't know I was looking for. And because of that, I suspect I will listen to it far more in the coming years than the Lateralus re-tread I'd been expecting.