Initial reactions aren't always accurate, people's views change, and 

science has its insurmountable way of convincing people. Gavin [1] 

and others [2] now cite selfish mining as a concern in the block size 

debate, and more importantly, the paper has been peer-reviewed, 

cited, and even built-upon [3].

Let's elevate the discussion, shall we?

[1] Here's Gavin concerned about selfish mining: 

[2] Here's Adam: 

[3] This is a very nice extension of our work:

Ayelet Sapirshtein, Yonatan Sompolinsky, Aviv Zohar: