BH sent me the dreaded email about my item being on backorder... I guess I am not getting a 5d3 before April..
I wouldn't draw that conclusion (unless you ordered late in the game, of course). With an operation the size of B&H, they are likely to have automated batch processing jobs that generate such e-mails on a regular (perhaps weekly) basis. I seem to recall some option like that or being told that on their website somewhere, but I can't find it now.
Incidentally, my B&H order confirmation was received at 12:12 AM ET on 3/2, so fairly early (I hope), and I too received that e-mail.
I did get an e-mail from them this morning asking me to rate their customer service (I had called them to change my shipping options). I took the opportunity to politely inform them that choosing not to communicate was damaging their image. FWIW.