I guess the length of the stage was in his benefit. Circumstances (Lopez & Roglic crashing) were also not against him. But still riding away from Quintana & Soler is no small feat. Now i'm extra curious to see if they'd pull him out. Come to think of it, maybe the stagewin is an extra excuse to pull him out ("already a success").
I really hope they don't pull him out.
Sure, it wasn't even planned that he would a Grand Tour this season however after what he is showing it would be a mistake unless he cracks in this second week, because the third week isn't even that hard, the climbs are much more gentle than Mas de la Costa, Los Machucos...
I still think the fifth place is the most likely for him. He might catch Quintana and Lopez in the TT but since he struggled in Mas de la Costa, the same can probably happen in Los Machucos and Puerto de Acebo. It would be the team's best GC result in a Grand Tour this season