Agreed, most people want faster adoption/change, but I'd say this article is fair for where we're at.
For 2013, the businesses accepting it are going to do it b/c:
1) It's a cool, neat option to accept payment
2) It may make them a crap ton by earning them bitcoins that will grow
3) They will be poised for when it really takes off
Any business accepting bitcoins expecting to replace their entire book of sales with sales via bitcoin is just silly... sorry even for 2013... but as this article says, 2-3 years... we could be looking at something completely different.
and the businesses that adopt it this year will most likely be happy they did.