A couple of quotes from Miller:
"You are always exposed to criticism from several directions. We can’t behave solely based on that criticism, because you’d effectively end up being paralyzed. You have got to do what you think is the right thing, and you treat everybody the same..."
"The fact that two fairly high-ranked players in 2013 were sanctioned, to me, should be at least some indication that there is no discrimination whether you are ranked No. 1 or No. 1,000 in the program..."
"It’s not just about testing numbers. It’s about testing the right people at the right time, and there’s more of an emphasis on intelligent testing than there is just on testing numbers."
My one comment on Miller's statements is that, in order to end potential doubts about "discrimination," the ITF would need to publish all anti-doping decisions regardless of the verdict. It's unfortunate that they refuse to do so.