After wearing the Capezio MT-11 tights for several classes I went back to the pair of 5945 style. And promptly decided that the store clerk was right: they are far more comfortable. The MT-11s will now sit in a drawer "just in case". Or maybe I can wear them at the Renn Faire.
Most people might not care about my trials and tribulations with dance tights, but it's a popular search hit. For the benefit of those men (and parents of boys) who care (and voyeuristic women), I'll babble on.
As I've mentioned before I'm not your average male dancer. I'm 5'10" (1.7m) tall and weigh about 194 lbs (88kg). I've always enjoyed bicycling so my legs are not scrawny. The store clerk decided that the 5945 size large would be too big for me, so the pair I have are mediums. That'd probably be right if I were thinner, but they try to wander south during class, and the waist was just too tight until I stretched it a bit (accompanied by snapping sounds).
According to the Capezio fit charts I'm right on the cusp of size ranges. So I've decided to order some 5945s in size large. For reference, Capezio recommends buying 5945s "one size smaller" (smaller than what?). The MT-11s I have are size large and also creep about the same amount, so apparently it's true.
Back Bay Dancewear had a good price on them ($23.25/pr, plus $6.20 Priority Mail shipping and $3.50 "handling") so I placed an order Sunday shortly before 6pm. I got acknowledgment and confirmation emails of my order later Sunday evening. Monday I got notice from the USPS that they'd received "electronic notification of shipment", but nothing showed up in the USPS tracking until this morning. Unlike UPS or FedEx there isn't enough detail to tell when the package was actually shipped, but I'm hoping I'll get it before class tomorrow.
Update 4pm: My package arrived save and sound this afternoon. I'll find out in a couple of hours how well the 5945s in size Large fit.