Nope, there is no "same long count" at all. This is a ridiculous way to justify the long count that Douglas was given. And it was long, twelve to thirteen seconds long. The rest of the fight should not have been, period. Douglas' ass was saved by that long count, and Tyson should have won right then and there.
It was both. His dramatic change of style and conditioning. In that Rudduck fight he hardly threw any good combinations, nor was he moving his head like he used to. Watch the bonecrusher fight and the rudduck fight and you can see 2 different Tyson's in terms of skills. Jose Torres even touched on that in the rudduck fights that the style of his had changed. As for the Stewart and Williams fight. How can you notice if a fighter has slipped if he knocks you out in the first round? You simply can't. The fighter has to go rounds before you can see that.