The man is clearly grumpy about all of the success of Linux had, and he surely knew that was giving an interview to a Linux supporting website, which leads me to believe that this was a flame war that he was clearly looking for, in any case, the Slashdot community picked it up (maybe just like he predicted) and people are talking about Minix again, which is good for him !
Nevertheless, he does make a point in micro kernels being more stable and reliable, an important buzzword in the embedded community, specially if you're into the safety-critical development tree like me. I'm now more tempted than ever to evaluate Minix as low cost alternative to the Green Hills, QNX and Wind River options.
This interview was probably god send for him. !