Seems like it was WP7 performance that was the deciding factor: http://www.youtube.com/watch?v=UfTS1f8vqAo http://www.youtube.com/watch?v=UfTS1f8vqAo The mista

Seems like it was WP7 performance that was the deciding factor: http://www.youtube.com/watch?v=UfTS1f8vqAo http://www.youtube.com/watch?v=UfTS1f8vqAo The mistake seems to have been not testing WP8 performance with the new IE engine before setting up a blanket block. Only the older devices needed to be blocked.