Originally Posted by inthchips
This sounds like what AS has done for the last couple years before finally giving it up and going back to a more orderly (although I haven't seen it personally yet) form of boarding. It had created chaos at the boarding doors, to say the least, not to mention the mess inside the plane. Thankfully, AS has come to its senses and dropped the idea.
All AS is doing is boarding Y in TWO groups: 15+ and all rows. In addition, they are actually (gasp) pausing to give several minutes between the two groups.
HP's 7 group boarding system is the best that I've seen so far.