As much as Tyrod has earned the starting position (and he did), I think EJ has earned the #2. However, I don't think his performance in the preseason games was as good as many have hyped them up to be. EJ's TD pass to Palmer in the end zone vs. Pitts, for example, while being a very nice throw, was against a defender who blew the play so badly he might as well have not been there. The defender (a safety, I think?) was so lost on the play-- he had no play on the ball, or on Palmer-- he looked absolutely confused. The Pitts D is terrible this season. Their #2 D is really, really terrible.
The other side of that coin is that as EJ has played much of the preseason (including that Palmer TD) with our second string O-line, and skill positions, which makes it a little difficult to evaluate how well he was reading the field.
Be that as it may, I have far more faith in EJ's abilities than at any other time, and I think that is a fairly common sentiment. I hope he gets some mop-up duty this season, and continues to develop while riding the pine. It certainly didn't do Tyrod any harm.