I ordered at 5:30am Eastern. I'm rather frustrated with all the xx:xx and xx:xx:xx notation here because so many people assume "we" all ordered within minutes of launch. WRONG. It was a work night so I ordered when I got up for work.
I honestly thought I could get away with coming in 2.5 hours later and still get a decent delivery estimate. I had a feeling space grey with black would be the most popular but I never imagined it would be this popular. I went back in later on during the day and could submit new orders for SS models and get better delivery estimates than the estimate I got only 2.5 hours after launch!
My first estimate was June which has since improved to May 29-June 11th. I wasn't planning on adding anything to this thread until mine flips to "preparing for shipment" until I saw your post.
I'm in the same boat: ordered about 4:30a (EST) on April 10th, underestimated the 42mm sport SG+black orders, had a nonspecific June that improved to May 29 - June 11.
The wife's (42mm sport silver+white) - ordered the same time - came on the 24th