It certainly was a thing that after losing the adamantium in 'Fatal Attractions', Logie's healing factor eventually came back a lot more powerful than ever before, and again, even more so, after Wolverine #100, when Genesis' botched attempt to give him new metal-bones resulted in Wolverine going totally feral-man-animal for a few issues, before stabilising as the mid-1990s legend that was Noseless Pirate Wolverine.
While things eventually returned to some semblance of normality in terms of his appearance, the last decade just kept on making him heal everything faster and faster, culminating in things where his arms get all the flesh burned off, and it re-grows within pages, and eventually to the Civil War tie-in, where Nitro left him just a skeleton, yet he had completely healed within just a few pages. If I remember right, people kept on justifying that they were writing things like this, by referring back to that time when he regenerated from a single drop of blood, all the time ignoring the unique context of the magic gem that made that happen.
And while the "Logan dies" storyline was supposed to fix the problem (and did so via a plot that would have been the most joyously insane Wolverine storyline of the decade, if not for Lobe's Sabretooth saga), immediately afterwards we had Logan sat inside a car full of explosives as it was blown up, and being fine within a page or two, and since then it's been business as usual that he carries on healing everything immediately. We're never, ever going to get back to the original point, where he'd heal everything, and faster than anyone else, but it'd still take time.