I am on a snp 12.2 on os 4.4.2, I can type faster than my keyboard can keep up with. I've tried a logitech bluetooth keyboard and a generic amazon case one. Both are slow will going to 5.02 solve this? I prefer the stability of the 4.4.2 tho
Something else must be going on with your tablet. I have never had that problem with my Logitech keyboard. Maybe some program or app is running in the background. Or something is downloading in the background. Wait for downloading to stop and then close all apps and try it again.