The analogy is a bit premature, don't you think?
It's also completely ridiculous
to leave out a head to head comparison between Brady and McElroy.
For instance, when Brady played Arizona earlier this year he lost
with a 1 TD/1 INT performance and a QB rating of 79.5.
When McElroy played Arizona he managed 1 TD/0 INT victory
with a 118.5 QB rating.
So McElroy is actually better than Brady until proven otherwise.