Ok so I haven't found a solution to make this problem go away, but I think I can explain the issue a little bit more on why it's taking some of you 3 taps or a "random" number of taps for the CMD + tap to work. Try holding down CMD/Shift, move your curser, then tap. It will select on the first tap this way. I have no idea why this is the case, why the curser needs move just a slight amount after holding down CMD or Shift for tap to register, but it does explain why it will take 3+ taps for some of you, because your curser will inadvertently move slightly on one of those taps, causing the next tap to register. I feel this will be some intentional "fix" for accidental inputs, just like that craptastic fix that was added to the caps lock where you have to press it just a tad longer for it to register that you pressed it. These aren't fixes apple, they're bugs. Not sure why they're messing about with their keyboard and trackpad setups when they already had the best setups on the market (IMHO).