Breath EMS Destroy doesn't confirm Shepard survival, it only implies it, and in a strange way.
I see voteDC's perspective. I don't agree with it, but I do think that Bioware, at least initially, didn't go over the edge just enough to confirm Shepard's survival. And even dramatically, there's not enough to necessarily carry the message of "Shepard made it"
That said, you add in the parts from Extended Cut and Citadel DLC (and even little symbolic gestures in stuff like Omega DLC)... and its at least HARD to ASSUME Shepard only died alone in rubble. There isn't that part. You get enough content implying that he's woken up, trying to get out, and a hand will pick him out of the rubble and he'll live.
In any case, Shepard seems to have 'died' in all endings. Even the Destroy ending might be that he was temporarily dead before something brings him back - IT-wake-up or suit defibrillator or whatever. And his 'Afterlife' is utterly up to our perceptions. Bioware may choose to address this in some way in the next game, or leave it entirely alone; arguments could be made for either happening.
All endings end with hope. There is is that. Even Refuse and Lowest EMS Destroy have it, even if to a lesser extent. The Reapers are defeated. Shepard.. well.. um... yeah.