Pilots, do you really not have acceleration data during takeoff?
Perhaps foolishly, I've been reading the thread in R&N about the EK tailstrike drama in Melbourne. I may have misunderstood, but several posts there imply that there is no acceleration display on the flightdeck, and thus no immediate way that the crew will know that the aircraft is (for whatever reason) not accelerating as it should during the takeoff roll. A couple of posters mentioned "rule of thumb" guidelines, e.g. 80kts by 1000' or some such, or even "feel".
I just wanted to ask: is this for real?? And if so, why on earth - after all the careful pre-takeoff performance calculations - is this simple, easily calculated bit of rather crucial information on actual performance not prominently displayed for easy reference?
Thanks for setting me straight if I've got it all wrong.