Re: Is it true that DCA is markably less crowded than DL on Weekends?
DCA is markedly less crowded than DL. Period. End of sentence. All the time.
Now, DL is very crowded on weekends, as the "When will DL be busy in 2008" sticky thread at the top of this forum states. I'm not sure whether choosing DCA over DL because of that is a good enough reason. I'd probably just stay home if that were the case. I've got a list of things to do around here that won't get done on their own.
DCA is always less crowded. Not sure how this will stand once TSM opens. So if you are planning a trip, make sure the day you think will be most busy at the resort, go to DCA that day.
When TSM opens, there will be a long line in DCA for TSM. And likely nothing else -- except maybe for Screamin' since it's so close: no reason to go all the way to the end of the park for just one ride. Mainly AP'ers, getting their first ride in. This will take at least three months to subside, if it is as good as Monster's. Might take more if it's better, i.e., if there is major rerideability.
Perhaps someone elase can provide historical info on the subsiding effects that occurred with Buzz, Monster's, and Nemo (Nemo will be a special case, due to its low capacity). I'd do it, but Al's updates are the best monitoring device out there, and it is not archived. (hint, hint.)