One slight update to my update :
Just adjusted my keyboard Tap Interval to 100, Hover Rate to 100 and Swipe Sensitivity to 6, and I've noticed improvement in keyboard responsiveness overall. So the complaint I had in General for lags, selections being ignored, etc. may be related to those settings, and at least some of the issues may go away as a result of the tweaks.
If you want to try changing yours, go into Options > Screen/Keyboard. The settings I picked above seem pretty popular, but each person will have their own preferences.