... unless you choose to use the Instamail notification option offered by AS. It sends an email to your seller thereby giving away your method when a successful snipe has been placed. I turned mine off. See below:
How do I turn off InstaMail?Login to AuctionSniper
http://www.auctionsniper.com/ click on Modify Account. Under Preferences scroll down for InstaMail and uncheck the box. At the bottom of the screen, click on Update My Account, log out, and you're done.
A friend of mine prefers to manually snipe, though she is registered at AS. We are using a T1 here and I've seen her get within 4 seconds
so just because a snipe is close in time does not mean it was placed using software - by the way.