Hasn't this topic been beaten to death enough on DCUM? I'd bet there are well over 100 pages of posts with people arguing these issues.
OP: Put your money where your mouth is.
Tell us exactly how many kids in your child's K class are currently seven years old, and how big the class is. And name the school so others can verify whether it's true or not. If you won't back up your claims with details that others can verify, I assume your claim of "several" seven-year-olds is the usual bullshit.
I don't doubt that there are a couple kids older than the norm in many classes. I can easily imagine a child who was born in the spring (Feb-April) and was held back a year, so that child would have recently turned seven in K. But if anyone here wants to claim "several" that are significantly older than the norm, I think you've got to back it up with verifiable details. In fact, as I'm writing this, I am recalling earlier threads where the exact same challenge was issued. Here are two examples from almost exactly one year ago:
http://www.dcurbanmom.com/jforum/posts/list/45/56242.page
http://www.dcurbanmom.com/jforum/posts/list/150/48834.page (pages 11 and 14)
As far as I can tell from those threads, no one had the balls (to quote OP) to back up her claims with details. Is anyone willing to step up this time around? Name names and provide numbers, or else pipe down.