Krul had the right idea in that he waited for a long as possible before diving. Always the better option in a shootout against players who don't normally take penalties, and especially players likely to be pretty mentally unprepared for the magnitude of the situation. Up against regular penalty takers during a Saturday afternoon PL game you have to pick a side and go, so fair play to Tim for getting his strategy right.
On the gamesmanship, I'm not in favour of it. Looked pretty classless up against minnows like CR. If I was a peripheral Costa Rica squad member I'd have walked up there and punched him on the jaw. See how you like that for gamesmanship, prick.