I think the extended processing time may also have something to do with their process of verification with other agencies (that they can't control) like the DMV that the vehicle was actually submitted for a TX registration, etc. After TCEQ's program approval, the actual writing of a check has to be done by yet another state agency (Texas Comptroller) and that involves entering a whole new queue there.
My own application filed in early November was among the first 35 approved by TCEQ for this particular program, but I am still waiting for the actual check. It would seem like they surely could find ways to streamline this whole process, but on the other hand I am happy enough that the State government apparently doesn't just spit out checks without making sure that an applicant actually qualifies for whatever program is involved. I have decided to go into SWW (sit, watch & wait) mode for a while longer.
when did you get the email notice that yours was approved? I got a reservation number Nov 10th and got approved about 9-10 days ago. Kinda curious when that checks coming
