I'd like to see some actual independent, not-the-same-dude tests before I switch to this style.
A/B Testing case studies are good for two reasons:
a) Help create curiosity on what the heck this A/B thing is (good for my product)
b) Gives you ideas to test on your website
But it is very dangerous to implement results without testing for your case. Very, very dangerous.
I wish they'd stop writing "You should follow me on Twitter" as well. That's just about the most irritating, patronising thing I've seen in weeks. I am quite capable of choosing how to spend my time, and following the orders of someone whose web site I have just arrived at (probably looking for some actual content, which has been shoved further down the page by some annoyingly over-sized blue bird logo) is not high on my list of priorities. On the contrary, you could just relabel your entire page "Back" and make it clickable to simulate the effect it has on me.
Ah, I feel so much better now. :-)
People like following blindly.