And that sounds like what the author of the OP said here:

"I’m willing to bet, at some nebulous point in the future, long after Drexler and I are dead, someone may eventually develop a technology sort of vaguely like what he imagines."

It's been a while since I read Drexler's books, but if I remember correctly he alluded to more mechanical processes than biological ones. The article you linked to is purely biology and not really what Drexler was arguing for.