I ordered my XPS 15 2-in-1 (fully loaded) on Apr. 2 and living in Alaska had no option to pay to expedite. Was pleasantly surprised to receive it on Apr. 13, only 2 days after it shipped from Dell on the 11th.
I usually would not order a product at release (being an engineer I understand early production runs can have QA/QC issues). But I sprung for Dell's upgraded warranty & support to hedge against any potential defects.
No problems with the keyboard and I have used it pretty extensively for the last 3 weeks. One issue with the RealTek built-in microphone array - unclear yet whether hardware or software. Extremely satisfied with all other aspects of the machine.
One other thing to note - having also held the Spectre X360 15", the (slightly) smaller form factor and weight of the XPS is certainly felt, and makes the tablet experience more practical & enjoyable.