Alright, I tried it for you guys:

I ate one miracle berry tablet (I think the recommended dose is half a tablet, but screw it). The tablets were pretty old, so after consuming it I tested with yoghurt to see if the results held up. Indeed, the yoghurt tasted like cream and was not sour at all, so the tablet was good.

Afterwards, I tasted Sriracha sauce, Tapatio and Valentina Extra Hot. All sauces retained their usual taste, except there was no burning sensation in the tongue and mouth at all. However, the sauces retained their burning sensation in the throat, completely intact, as far as I can tell.

I'm afraid that I didn't have a control spoonful of sauce before the tablet, because I didn't think of it, but I can have some once the tablet wears out. I seem to recall, though, that a spoonful of Sriracha does normally burn my tongue.

Thank you so much!! Interesting results and basically what I expected. I'll try the same except with a habanero, wonder how far it goes.

I'm sure one of the sauces I tried has habaneros in it (probably the Tapatio, possibly the Valentina). I think the effect should generalize well.

Now that's interesting! Thanks for taking the bullet for us, and thanks for sharing.

No problem! True to my word, I had another spoonful of Sriracha (much to my girlfriend's chagrinned cries of "You're going to smell like garlic again!"), and it did, indeed, burn the tongue.