In the early rounds of competition, how do judges generally manage to call back the correct number of couples from multiple heats? I raise this question because I hear people talk about whether or not they were fortunate enough to be in an "easy" heat (compared to being on the floor in another heat that is dominated by competitive couples) but I'm wondering how much of a factor this really is in results. So for example, do judges try to call back equal number of couples from each heat (EG call back 12 from 2... so call back 6 from each heat?) or do they try to strategize and leave more or fewer spots open for the 2nd heat, or later heats? Further, does the first dance and therefore the first overall glance at the two (or more) heats influence how many to call back from each heat, then, by the 2nd dance? (ok well these 4 couples were in the last heat so I have to make sure to leave 4 spots open by that heat.... etc) These are just some general musings of late Judging seems difficult...... And of course, you can never attribute results on one particular thing, this I know. I'm just wondering what it's like to think like a judge!