Good news for me today, too.
CoPR arrived today and my phone interview is scheduled for tomorrow.
Here is timeline:
Email for Express Landing and phone interview received on Dec 6th, I replayed same date.
Mail is dispatched on Dec 8th
Mail received today, Dec 13th
Interview scheduled for Dec 14th (between 12.30pm to 3.30pm EST)
I live in Toronto area, letter was sent from IRCC Montreal.