160m FT8 RX

After having some fun earlier on 630m (472kHz) WSPR, I have QSYed again to 160m FT8 RX. As yet (2246z) no North Americans spotted, although lots of Europeans spotted again.

As no expert on 160m, I presume stations in North America come through later in the night as the days lengthen?

UPDATE 2250z: Best DX so far tonight on 160m FT8 RX using the earth-electrode "antenna" in the ground is UW6PA (3462km) in Chechnya.