Yeah he and the other staff members are trolling the fans and ignoring them.
This was a really bad response. Not because he didn't surrender and say we were right. He has the right to stand by his product and I respect that. But when it comes to addressing fans about something that could damage Bioware's reputation for their future titles, the last thing he should do is quote from other sources to say how awesome his product is. To make matters worse, he only vaguely acknowledges the criticism to the ending, when there are dozens of sources like Forbes and the charity deal that are much, much more telling then Penny Arcade quotes. Because even before I got to the ending, this game wasn't really a triumph. It was great, but a lot good stuff was cut out that was present in the previous games. And it was buggy as crap. KASUMI!!!!!!!!!!
BUT, the most telling part of his response has got to be this line.
"We always intended that the scale of the conflict and the underlying theme of sacrifice would lead to a bittersweet ending—to do otherwise would betray the agonizing decisions Shepard had to make along the way."
Now, tell me with a straight face that this quote reflects what we were initially promised with Mass Effect 3. That promise being that our choices
MATTERED. Now, I'll admit the endings to the first two games were linear, but they did have very big differences.
ME1
Good Ending: Shepard saves the council, only one crew member died and humanity has earned the respect of the council species.
Bad Ending: Shepard sacrifices the council, two crew members dead with a lot more side characters needlessly killed, and humanity has a foot hold in the politics with the intent of being the leading race.
ME2
Good Ending: Everyone survives the suicide mission, the collector base is destroyed, Cerberus has lost a valuable tool to ensure human dominance, and the genophage cure is secured.
Bad Ending: Every squad member is dead, Cerberus has taken over the collector base, the genophage cure is destroyed.
ME3
All Endings: Mass Relays destroyed, crew of Normandy stranded, and galactic civilization is destroyed.
See how choices in the previous games affected their endings? Choosing to save the council or destroy it really put a grim tone on the ending to the original Mass Effect, as was the sight of all the coffins of dead crew members that Shepard lead into battle. All of these endings had one very important element that was readily apparent to the player. If you had only done things differently, you could have had a better outlook for everyone.
About the only thing that could qualify as different in ME3's ending is whether or not Earth survives or is destroyed. But really, why should that be a game changer when clearly the whole galaxy is at stake?
So yeah. We've just been told by the big cheese that there wasn't meant to be any alternate endings at all. It must all come down to a bittersweet ending, because he said so. Man, Casey must have based the Catalyst off of himself.