The first spot in North America of my little 500mW WSPR beacon was by W3CSW (5886km) at 1206z today. My report was -14dB S/N suggesting 10dB weaker (or even less) would still have been enough. Since then, several USA stations have spotted me. I have lost count now of the weeks and weeks the 10m band has opened to the USA and Canada after lunch.
In years to come, we'll look back on these days with envy! In the quieter years it can be a very long time indeed between good E-W openings. At such times multi-hop summertime Es can be the best/only chance of getting to the USA.
UPDATE 1824z: The last USA 10m WSPR spot today was at 1716z by K9AN (6505km).