Except that they are incorrect in their perception that he chokes in key situations.
Honestly, I have no idea where he falls... probably somewhere around average. The hazy part is that Romo haters will turn early season AFC games into "key situations", but when Romo throws a touchdown with literally :00 on the clock to force overtime in Week 16, it's just another game. That's what makes it pointless to argue with Romo haters... they keep moving the goalposts until finally they just say, "Anyone without a ring stinks."
You can brand people as "haters" for thinking he chokes in key situations all you like, it will not erase what has happened to earn Tony that perception. There is a reason that Brady, Manning, Brees and many others do not have that reputation and Tony does.
The finals minutes of a tie game and with your back against the goal line is the definition of a "key situation", regardless if it was against an AFC team. The last thing you can afford to do in that situation is turn the ball over, that is key. We can make excuses like someone stepped on his foot, but it was a bad read, trying to force the ball between three defenders, especially when he had Murray wide open right in front of him.
I'm not one who thinks Tony is a bad quarterback, or that he was the sole reason for the loss yesterday, but the fact is these same things have happened too often and the int yesterday just cemented the choke perception in the minds of many. I was, and still am actually a big Danny White fan, so I know how a QB can earn an undeserved reputation. It is a shame Danny is remembered that way and it will be a shame if Tony is as well. Both are/were great QB's who deserve better. Danny missed his chance to change his perception but it is not too late for Tony. As I said, Tony is the only one who can change it, not you, or I or anyone else. Once something is accepted as conventional wisdom, it is hard, but not impossible, to show them how they are wrong. To do so Tony has to stop making mistakes when the game is on the line because right or wrong, that is what the majority expect from him now.