2. Apple has some left over, but nobody is buying them. Which would justify the decision to discontinue the 17".
I really considered ordering the top end 17"... Even with 4GB Ram and a 5400k hard drive it was only $100 cheaper than the 2.6Ghz 16/256GB Retina display.
Of course the sales are bad at that price!
But as you said, i'm sure Apple is using that as continued justification for their premature evacuation of the 17's.