With good Es in Europe I am beginning to think my 10m JT65 South American spots (I have just been spotted in Paraguay again and have spotted a station in Sao Paulo, Brazil) is a mix of Es and some variety of F layer propagation. I am no propagation expert but think equatorial spread-F may be a factor? It seems more than coincidental that all my South American JT65 spots on 10m have been on days with good European Es. I am thinking that Es is linking with some sort of F layer propagation nearer the equator. Equatorial spread-F is meant to occur after sunset.
There are several papers on equatorial spread-F, so I suggest you Google these if you are interested.
UPDATE 1728z: No further South American spots this evening on 10m JT65, well not so far. No further Es either.