Thanks for the update!
Not a great analogy, no offense. When I pre-ordered the game, the page said the 24th. I had no reasonable expectation that it would be available before then. If Stardock failed to deliver on the 24th you'd be a little closer.
Frogboy has been saying for a week it'd be an early release, and he said on Friday I believe that it would be this morning / mid-day. I'd consider him saying they'll do it to be sufficient for a reasonable expectation it'll happen, just like me saying to my boss I'll go in on Monday gives them a reasonable expectation I'll be in work on Monday. I'm not contractually obliged to be in work on Monday, but I reckon if I don't go in or at least let her know I won't be in she's got reasonable grounds to be upset even without having anything in writing saying this would be the case.
Or in other words, if I tell you I'm going to do something and then I don't do it you'd be reasonably expected to feel some measure of disappointment because there's a breach of trust, not because you have an overblown sense of entitlement. Now if Frogboy had stated they were actually just going to sit on it until release day and people started demanding it be released immediately you might have an entitlement issue, but complaining that someone did not do something they said they would is just plain old human nature.