Put cursor on the method. Tap the icon of a 2x2 grid for the file. Tap the callers menu item.
Yeah now I read my post again the sarcasm wasn't completely obvious. Sorry. Still I was working today in Xcode and the reason I still use CMD+SHIFT+F and T so often is because it's so blazingly fast. Instant. Other IDE's have a full text search that is much slower than a more exact method anyway.
I can imagine. Especially when it's one of the few features that actually exists in Xcode.