No. I don't think we're a cup side. We've been consistently brilliant but played the same way in every game. It's a bit like pitting a marathon runner against a sprinter. Teams can raise their game for a one off cup tie hence the phrase "it was your cup final". There's an element of truth in that. Liverpool can regularly play us like a cup tie but flounder against run of the mill opposition in a routine league game.
IMO, that's why we're susceptible to the likes of Wigan and struggled against the likes of Wolves and Bristol City in the cup we did win. It's also why doubles are relatively rare.