Are we seriously discussing why a company should communicate instead of ignoring its customers ?
As a customer, a company that doesn't answer my emails (I'm not even talking about answering inquiries from a person who already paid a deposit) looses my business. Period
As a seller I would feel terrible not answering or updating my buyers especially if there's a delay (that's really the least you can do).
I've never preordered anything from EFX (and I surely won't now) but no matter how serious some people think they are, no matter how long you have to wait to get the product you paid for the lack of communication is just textbook bad business.