In response to the original question from jester, I'm not sure there is an express line per se if you've filled out online docs. I believe you still use the same lines you would otherwise (regular cabins in one line, suites in another, etc.), but the actual check-in proceeds more quickly for online docs customers because they already have your vitals.
Is that correct, or should I be looking for a special express line at Port Canaveral when we board Mariner?
Also, is there an express line for Crown & Anchor members? (We're lowly gold members, but hey, if it gets us through faster, I'm happy.)