I guess i am old, but i always thought the ready checks in WoW were an annoying eye sore, that i felt like wasnt needed. I ran raids in eq1, and eq2 for years without and them and did fine... just required people to state they were back from afk, or say, "hey, i need a second before pull".
well, in raids after we are done talking about what went wrong, (assuming you raid) its stupid to keeping yelling, are you ready? , or to just dive in. you cannot assume everyone is ready, or type, most people will go AFK