That one should be emphasized. A guy who, at most, could hang on around top10 in a few hard climbs (not exaclty Stelvio tier, but let's be charitable) turns himself into a world class climber destroying everyone on the Stelvio. Within 1km (around 9km until the end of the Stelvio) of him hitting the front, everyone but TGH, Hindley and Kelderman are dropped. Kelderman doesn't manage to hold on for even 2km. Breaks the Stelvio record climb in the process. Then, after a descent when the difference stays more or less steady, proceeds to put another minute into everyone in a few flat kms until the beginning of the last climb.
In Sestriere, after destroying everyone bar TGH and Hindley on one of the passes, puts the hurt on his team-mate and Hindley and looks like the strongest climber on the race, neutralizing several attacks by Hindley. The GC duo lose his wheel several times on the final climb too.
A freak show for the ages, a performance only matched and surpassed by the Dawg two years before in its ridiculousness.
It's a good one. One of those days where I often think we'll look at differently given time - I think it'll be another couple of years til we really know what the level of that Giro was. Yeah they went fast, but where it fits in vs. how quick everyone's going up every climb this year remains to be seen, IMO.
The only other caveat I can come up with for the Dennis performance is that he's done the odd freaky ride on high altitude stages here & there through his career.