That's because it's November. By March and April, we witness an inexplicable phenomena where GMs start falling over each other for QBs and they shoot up the boards.
As for the McShay article, I think he meant there are no elite prospects. Which is true. There are no RGIIIs or Lucks. This doesn't mean that 2-3 of the QBs in this class will not turn out to be elite QBs. Nobody knows this - not even McShay. Flacco, Rodgers, Dalton, Wilson, & Brees (or Kapernick, but its too early to judge him) were never considered elite prospects, but they're not doing too bad in this league.