Yes, that's me. I like to use Admin to answer questions about the website, and Waltz123 to participate in discussions as a regular user.
In all styles of dancing, the dancers often like to take artistic license to "stretch" and "squeeze" counts for added musical emphasis. In this regard, one might describe the stretched counts as "slows" and the squeezed ones as "quicks". But this would be a completely different usage of the words "slow" and "quick", a subjective description of the feeling one might get from manipulating the timing, not a literal description of beat values where Slow = 2 and Quick = 1.
I guess you can't say it's wrong, but I'd recommend teachers use something else to describe this method of manipulating timing. The words Slow and Quick have come to mean something very specific in the teaching of ballroom dancing, and when you switch semantic gears without a thorough disclaimer, you're begging for confusion.
But let's say for the sake of argument I were going to use Slows and Quicks to describe which beats are stretched and which are squeezed. In Waltz, I would be more inclined to use QSQ, where step 2 is held the longest. On the other hand, if I have a beginner student who needs help completing the lowering on 3 to avoid "lurching" into the next 1, I might describe it as QQS. In other words, SQQ in Waltz is probably only rhythm I *wouldn't* use.
Regards,
Jonathan