I just did another and got 502 today....was 431 my last post. It could be more were added between now and then as well....so I'm not sure how valid the test is after "X" amount of time. That is unless those getting the really low numbers continue getting the low numbers.
You can back them up with astro (free) or mybackup pro (paid) I used both. Mybackup pro also saves your home screen setup along with set ups for more icons and apps organizer. However, some widgets I had to reset.