I guess they changed it to make it easier...she wouldn't really talk about that either...just that it's changed and that this is the right way.

I suspect AEDs have a lot to do with it. If you have an AED, you just go nuts until it tells you to stand back...then start when it tells you to start again. If you have to time 30, 15, or 5 compressions in the 2 minutes the AED gives you before hitting them with the juice, it could get confusing.