1. Right now, the reason the ISU uses age restrictions is to limit the amount of stress/expectations placed on children. This, in my mind, is absolutely, 100% correct. I, personally, have an issue with the amount of hype/pressure surrounding the junior performers in general and think internationally, this makes sense.
2. Further to that, I think that national federations should implement age restrictions as well. But they won’t, so this is the next best thing - using testing, etc to see if you qualify as a senior.
3. Because there are two different systems in place: internationally with age, and nationally with testing (in most nations), I don’t think using two different systems is inherently illogical or unfair. In fact, I’d argue the opposite.
4. Let’s take an extreme example. Adelina Sotnikova has won two Russian (senior) championships and was 4th the other time. She is not age eligible for seniors and will not be until the 2012/2013 season. So should she be allowed to go to junior worlds?