Sorry Eva, but although technically you are correct, in that coffee is indeed a weak phytoestrogen, the emphasis is on
weak. So weak in fact that just about only cows milk, beer and water melon rank lower in a Canadian study of 121 common foodstuffs.(
http://www.dietaryfiberfood.com/phytoestrogen.php)
Coffee is at least several times weaker than, for example, both red and white wine, raspberries, onions, cabbage, green beans, olive oil, hummus, multi-grain bread......
So if your aim is to get rid of coffee on the basis of its phytoestrogen content, then by applying the same logic to everything with a higher content, you are pretty much going to starve fairly quickly, because of course "we all know" that meat is loaded with synthetic hormones so we can't eat meat and we can't eat veggies!
I also have a problem with this idea of 'competing for estrogen receptors'. Again, I don't say that it doesn't happen, but not in the space of two hours - if it does happen that quickly then it is irrelevant anyway because two hours later the weaker ones will have gone off an been replaced by the magical stronger ones...and breast development takes months and years, not hours.
As Chrishoney has said, there are loads of myths surrounding NBE and as far as I can see, most of the "facts" are things that "everyone knows" but in fact you can never find anyone who can quote a source for that knowledge.
I hope this doesn't come over as though I'm having a go at you personally, because I'm not, I've repeated things parrot-fashion myself before realising what I was doing, but we all need to be careful what we say, and even more careful about believing what we read.