Look, I apologize about the over-enthusiastic response I gave you. But after 4 months of battling this issue with no resolution, its exciting to see some news on it....
Think of it as kind of like ordering a new Z06 convertible (Yeah they don't make 'em now, but what if they did! 
), and while you are waiting for GM to build it, the dealer hands you just the standard vanilla convertible Corvette, and the a/c doesn't work!
Although the loaner you have and the Z06 you're getting are going to be really different experiences, you know they share a whole heap of parts.....
You do your research into the A/C problem so you are a knowledgeable consumer, find out there is a fix out there that the dealer will install no charge, so you take your loaner back to the dealer....well then it just goes out again....you take it back to the dealer again because even though the essence of buying a convertible has nothing absolutely necessary to having a/c in your car, but the lack thereof on some summer days can just make life freaking miserable....and besides, everyone that buys something want's their money's worth....
so again, take it back to the dealer, they say they fixed it, but the air is obviously not blowing cold. The reality is that GM has no idea what's going on with their hvac systems in their corvette lineup...as a knowledgeable consumer, this kind of ticks you off, because you've already basically committed to a large investment and although you haven't technically bought your Z06 yet, it's still an investment you put a lot of time and energy into....
so you go back to the dealer after a couple of months...because it's coming in close to getting your Z06, and you b*tch at 'em long enough...and you get an answer! After 4 months of no news, which isn't necessarily their fault, you get an answer that they have identified the problem and are working on the HVAC design so they don't have to keep replacing it.
So you are enthusiastic and very appreciative with the people at the dealership for taking time out of THEIR day to listen to you whine and complain. You are all smiles with them and excited again about the new Z06 convertible with 505HP and a 7k redline that you'll be getting in another month or so. You couldn't be more thankful that later on you don't have to kick yourself for buying a troubled car maintenance wise....let's face it, it's a big investment and not really worth it if you have misgivings later on...
Right then, at this momentary point of positive emotions, feeling good about the world, some jerk who's been listening to the conversation between you and the dealer butts in and says "Sound's like a non-problem to me...don't know why you would need a/c in a convertible!?!?!"
It's SEEMS like kind of a crappy thing to do to somebody who just had a positive customer experience with something that will ultimately be of significant personal investment. A statement of "sound's like a non-problem" is just so out of place, that it's first looked as a negative/jerk response instead of advice...
So am I tossing good advice out the window...not necessarily...please understand the situation before you throw in spectator commentary that is completely unrelated to the issue at hand...