1. What's the rush, you got cancer?
2. What are you looking to do? Video. Get a T2i body and practice, practice, practice. Put the savings into a good lens.
3. YouTube the T4i. There are A/F tests out there. Look at the focus. Is that OK with you? Look at the moire? Is it worse, better, the same?
I'd wait. Prices of T4i, T3i, and T2i will likely drop in the coming months. Be patient, assess you primary needs, and pick the one that fits them the best.
P.S. The T3i was a notable upgrade. Swivel screen AND wireless flash. T2iB, are you kidding me?