Yeah, it seems funny that way and hard to judge. I was there early last month and had a LL for Space Mtn at about 10 or so. Got on pretty quickly and as we were exiting I didn't see anyone in single rider line. So we hopped on in to give it a try and there was NOBODY ahead of us. We walked right on! Later that day (mid-afternoon) I thought we'd try it again. Didn't think we'd walk on this time, but was hoping for at least a short single rider line.... nope. Saw it was now snaking way out of the building and looked to have hundreds of people in it. We didn't bother.