You can read the article here:
Study Sees PayPal Adoption Down Among Multi-Channel Merchants
Now, you may also think well, PayPal still has most of the market when it comes to 3rd party processing and while this is correct, there is a big player coming to the game in 2012 with a bunch of developers backing them.
You may have heard of them before they are called VISA. They are launching www.V.me and it's pretty slick.