My question did get answered two days later. USCIS sent the approval notice to my lawyer. So I would say that "e-mailed" and "mailed" actually means the same, because no email was sent what so ever.

This H1B shit sucks man! and of course those fcukin IT consultancies. I advise people to never goto one of them people. My H1B was approved for one of those shitty ass consultancies in June, 2007, till when I had already decided not to work for them (damn criminals...and Americans think Mexicans are taking their jobs!!). Luckily I got another job in a nonprofit org. and then thanks to my hard work and luck, another H1B.

The whole process was stressful, expensive, and I gained a lot of weight.

P.S. I still don't know what happens to my old H1B..