I thought owners usually didn't keep roosters for that reason.Regarding the darker yolk and better taste in farm-fresh eggs, both rooster(s) and hens roam free and inseminate so could be part of the taste.
That is what I've heard.The yolks is much darker in fresh eggs. They are stronger tasting than store bought. I've heard once they're refrigerated they have to stay refrigerated. Washed or not.
Never really compared the two so I haven't noticed that much of a difference. I just know whenever I've had fresh eggs I always enjoyed them.