Not much to add
"Could you expand on your thought that we do win more hands in high counts or I am missing something here?"
Not sure what there is to expand on. As the count goes higher, you win increasingly more hands. Maybe you're thinking that you win more hands than you lose. That's not what I'm saying. I'm saying that as the count goes up, you win more hands than if the count hadn't gone up.
However, it also happens to be true that, for a shoe game, at TCs of +5 and higher, you win more hands than you lose.
"For many years I have always been under the impression and have read (somewhere) that that percentage of about 43% wins, does not really go up that much in a high count."
Live and learn! :-) The win rate doesn't go up all that much, but the loss rate goes down a lot more (therefore, more ties). The result is that, at +5, the wins outnumber the losses.
"The premise being that both you and the dealer have the same chance of getting the good cards and of course the dealers advantage coming from those hands where both you and he bust you lose."
As was stated, the lion's share of your extra profits comes from more blackjacks, more successful doubles and splits, insurance, etc. But, you also win more hands. Just go to http://www.bjstats.com/bjsc.asp, and, for the Table, choose "Win, Loss & Tied Percentage by TC." I used 6 decks, 75%, no cover, Hi-Lo, S17, DAS. Let me know what you find for hands won and hands lost at TC = +5. :-)
Don