He's never looked like winning a GT in his career and he hasn't made the top-4 on GC in the last three, so either:
- he's hit peak form for the first time in three years (highly unlikely)
- he's taken a significant jump at age 26 (very possible) of which there was no sign a month ago at the GT he was supposedly peaking for (not that likely)
- the competition is somewhat weaker than usual (only other option)
The fundamental thing with Mas is that he's been really consistent in the past 18 months, which definitely makes him the kind of rider you'd expect to profit from the field being below average. In the case of this Vuelta, Roglic has had a weird preparation due to him crashing out of the Tour, Bernal is very clearly below his best, and the other GC contenders have never won or almost won a GT either. Every rider in the top-10 bar Bernal is Mas' age or older, yet only four of them (Roglic, Bernal, Lopez and Mas himself) have made the top-6 of a GT in the past 5 years. Yates is the only other rider to ever have done so in his career. In other words, nothing about this Vuelta - neither the climbing times not the competition - suggests that the standard is high.
Can Mas ever win a GT, or at least look like doing so? If Geoghegan Hart and Hesjedal can do so, then yes, he can. If he does so in this third week, it will probably be more impressive than either of those performances. But will it happen by beating (or at least battling with) one of the best riders in the world who's in peak form? Highly unlikely. Which brings us back to the original, non-Mas-related point about the standard at this Vuelta.
You didn’t answer the question of how you are so privy to his development and peak? The whole 2020 season was basically shot for Movistar due to how they handled quarantine and isolation, and to me it looks like he misstimed his peak for the first part of this season.
Nobody knows how good he could be as nobody knows what he is capable of?