Although I have yet to be spotted on 6m JT65 by 4X1RF (me being vertical probably does not help!) he does spot some amazing DX on the band regularly. Every time I look I see spots by him at great distance on 6m. He only uses a 3 element according to PSKreporter - nothing too grand.
I assume these long distance spots are Es, but some could be tropo across the Med, but unlikely. I still wonder about chordal-Es as he seems to regularly spot stations a long way away. I have been spotted in Israel this summer (1W ERP) and I have spotted a station in Kazakhstan twice. Kazakhstan is a very long way!