I refer to it as "cheer/dance inflation", similar to grade inflation.
This is going to sound awful but confession: I do not really count any "experience" that occurred before a kid was at least 5. POSSIBLY 4 if it was an actual team. (Ex: If they were on a Tiny or show TEAM at a gym or with rec/Pop Warner.)
Example: If a parent tells me or lists on a form: "She's 7 but has been cheering for 5 years" it kind of goes in one ear and out the other.
She is in first grade. She has not been cheering for 5 years. She was like, playing and in a toddler gym class for 2-3 years and actually cheering with a team for 2.
She has technically been cheering for 2 years.
Stop it.
We flat out tell them that. If you say your child has been in ballet for 10 years, your child had better be 15-16. Anything before they're 6 is considered "pre-dance" or creative movement (I'd concede maybe 5-years-old). Your child may have been in classes before 6, but she wasn't learning any ballet technique. Mom gets all affronted when we say that, but any dance studio/academy worth their salt better be telling you the same thing - or I'd question them taking my money.
Now don't get me wrong - those classes have their value, too. It is a LOT easier to teach ballet (or tumbling, or cheer, or whatever) to a kid that has been in classes for years, because they already understand the concepts (being in a room without mommy, basic movement of their bodies, listening and following instructions, etc). Just like regular school - pre-school has its merits, because kids are still learning skills that they'll use in school later (listening, playing well with others, etc). So, I am in NO WAY saying they are a waste, just that they are what they are.
The part I really don't get is WHY. I guess it's supposed to be impressive (another event in the mom olympics? In addition to most exhausting hours-per-week schedule, level, now we're adding earliest start age) - but if you're telling me that, and then your baby isn't AMAZING... uh, what does that say? I'm much more impressed with someone who says they've been in ballet for 2 years and we place them in Ballet III than with someone who tells me their child has been in ballet for 7 years and we place them in Ballet I.
I guess I'm just the opposite - I'm constantly trying to explain to EVERYONE why my daughter is
not amazing, "Well, she only started last November! So it hasn't been even one year yet." I would most definitely NOT want someone to think she had been dancing for 10 years right now! :p