Yeah I definitely feel you on the waiting tension, but you did well to get an offer from UMD. That is a highly ranked program, and one you can succeed in. The program appeals to me for a few reasons.
First, I applied to programs all over the country, as you can see from my sig, and UMD is the closest to my hometown. I'm a born and raised New Yorker, going to school currently in Philly, so I've been purely east coast my whole life. My other top choices, Notre Dame and Ohio State, are pretty far away, so the close proximity of Maryland to home is definitely appealing.
Secondly, for my specialty, Maryland is very strong in Stratification. If you look at their course offerings, they have a wide variety of course offerings in strat and the faculty do a ton of work with race and ethnicity. I'm hoping to study stratification with an eye towards urban soc and cultures of the ghetto, and i think that matches up well with some of the work they do.
Of course, all these things are fairly specific, my home and my specialty, so I don't know if all this means anything to you. But that's why I like UMD, and am anxiously waiting to hear. Like you said, not too many acceptances have been reported, so I doubt that all acceptances have gone out. No news is good news, right? Visit day is at the end of the month, so just like you, I'm hoping that I ain't reading this the wrong way and I'll be getting a letter soon. UMD has a strong program, you mentioned that you were worried about your fit in it? what exactly are you looking to study? It seems like they have a broad reach with the things they study.
And best of luck with everything you still waiting on.