Didn't Hilton put out a property calculator where you could see the new maximum points for each property, which was intended to demonstrate the max points weren't going up?
I can't find that link, but it would be interesting to check whether any properties are posting above that calculator.
I would guess that on dates where cash prices are high, point prices are going to jump to the top of the highest point of the range, but if people are finding point in non premium rooms exceeding what that calculator says (if Hilton hasn't removed it), that would be about the crappiest stealth devaluation I've ever seen and would just be outright lying unless it's an unintended IT problem.