weird, mine was always responsive straight away, didn't do anything useful (like print), but it did instantly drive the nozzle hard into the bed the moment you pressed anything on it, no delay at all. replaced the entire printer 3 times, and all were the same so I think they are not supposed to take several minutes to be responsive. pressing autolevel was the only thing did work without ramming the nozzle into the bed immediately, and that worked within about 30 seconds of power on. So no should be pretty much immediately responsive.