I also received a shipping notification email from UPS MyChoice with the same info. "Metro Custom Brokers" Est. Deliver April 23 (My Birthday). Seems odd that we both got this and the Apple Watch is the only thing I've ordered.
Just out of curiosity, which one did you order? 42mm Space Black Sport for me.
Also FTR... nothing has changed on my apple store order page nor has my credit card been charged yet. Strange....
Can you at lease post a screenshot to validate this.