Well I got my +4 from azrobin!
I'm going to start a new thread for the results .. so post there please:
http://davesgarden.com/forums/t/675838/
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Zip +4 Match Up
beaker,
I got my WS #2 swap envelope, which was mailed on the same day as yours from SC to Indiana, on Monday using zip +4. I realize you are a little farther than I, but PamSue also used zip + 4 and is in OREGON and get hers delivered on Monday! That's South Carolina to Oregon. I thought it was amazing!
Even if the mail is fast this time of year, zip + 4 is still one to two days faster. (My opinion based on my experience -- we'll wait for the great Zip +4 experiment results.)
Suzy