The reason for the suits emphasis, is that is the easiest of the "+3" hands to get. I've been meaning to write some code for about 3 months now to test a count I've developed to beat 21 + 3. My idea is slightly different than scooters, and would probably require 2 people to execute it properly (one could do it, maybe). I will post my results whenever I get around to writing the code. My life is pretty hectic, full school schedule and full time job. Those two things keep me pretty busy, plus I like to play blackjack from time to time as well.
PS The nice thing about the 21 + 3 tables in KC are they are all 6 deck with really good pen. at $5 min. The side bet is $1-100. I *think* the side count can be more profitable than regular counting.