Huh. You learn something new every day. I didn't know the texture/flavour/whatever might be different in a rooster Makes sense now I think about it...
Rooster or Hen, they all taste the same. You would be eating boys when you buy stupormarket chooks.
The difference in taste is the age. Bought chook are rarely over 45 days old, so they are very soft and pulpy. They are also bred for very white meat. Home grown chook has a much "gamey-er" flavour and it takes alot longer for them to grow to a decent table size (like 180 odd days) so the meat is much stringier, more steak like, and often darker, like duck.
The reason folks talk about eating the roo's is cause the hens are good for laying eggs, so no-one wants to eat them.
You get just as many boys as girls when you breed, so you gotta find a use for the boys, so they usually become fertilzer or food