It isn't too rare to see somebody come out swinging at the Vuelta like this, even ignoring the unexpected GC tilt guys (hey, 2011) - often riders who've had gaps in their early season due to injury or illness or other issues so have more left in their legs than most can become monster stagehunters, especially as the heat lends itself to a slower average pace than the Tour (not always but frequently) and breaks contesting stages. Storer has had very few race days since the Giro and a lot of the people he's beaten from those breakaways have more race days in their legs. It is a bit weird to have a totally unexpected breakaway rider take multiple stages as opposed to an obvious stagehunting specialist like a Sylvain Chavanel, a Philippe Gilbert or a Paolo Bettini, but it's not unheard of. Ben King won two mountaintop finishes and was flying all over the breakaways in 2018, Tomasz Marczyński won two medium mountain stages as a 33-year-old baroudeur in 2017, Warren Barguil won two stages as a seeming new starlet in 2013, and Pablo Lastras won two stages from escapes in 2002 and nearly repeated the feat in 2011. David Moncoutié back in his GPM days won a stage in four consecutive editions, because he decided that after his success there in 2008, he would target the Vuelta, and arrived in a lot better form than many, especially those who were riding to save the season after poor Tours. There are a lot of riders winding their way to the end of the season here, and a lot of domestiques who aren't going to be expended as aggressively to catch breaks. If you're a young rider who can power over a lot of different terrains and has some great form, as Storer clearly does, there's definitely ways to get some wins out of that form if you plan your days out well.