Thanks Krane, Anna and Pat for your input!
Couple of thoughts trying to address a few of the ideas/questions in your posts:
1. Anna's right to point out that the PTA is the only parent organization that has a lobbying/advocacy set-up. That's one of the largest distinctions between PTOs and PTAs, as the article points out. Those groups that want to have a national political role/voice are smart to look to the PTA. Many groups, it seems, aren't looking for that.
On the other hand, I disagree heartily with your assertion that PTOers are selfish ("only have time for themselves and their own children"). To me the folks who give hours and hours of their time to volunteer at their school are the last folks who should be called selfish. Remember: whether you're a PTAer or a PTAer, you're giving of your time and energy and spirit to make a school (with 400 kids or so -- presumably not all your own

) a special place. Hard for me to call that selfish.
2. Pat: Wow! It sounds like the kids in your town are very lucky to have all kinds of parent involvement in their schools.
In answer to several of your questions: a) the "total schools" data in the chart represents all schools in the states, not just public schools. We believe this is the important number, as almost every school has a parent group of some sort and parent involvement is equally important in all schools. b)Here at PTOtoday, we try to stay closely involved with parent groups to judge what issues are most relevant for the magazine and the site. Just as Time and Newsweek have to decide on what news stories belong in their magazines, PTOtoday has to decide what parent group content belongs in our magazine. We also know that feedback like yours will help us build a better and better product.
(By the way, thanks for the compliment

)
Tim