I think
it was Arnold. He has a good article "you won't win" that anyone starting out ought to read. I learned this the hard way myself. I practiced. I could count 6 decks at 15 seconds a deck or less. I did not make errors in practice. I played at home. And when I went to the casino I got my clock cleaned the first time out. And, in fact, it happened most of the time. But being a computer person and having run my own simulations to "test this stuff out under what I considered reasonable conditions" I was confident in the math, even if I didn't quite understand the statistics behind variance at the time.
It is hard to explain how small our "edge" is in counting. It is _far_ harder to explain how wide that "bell curve" is that shows our EV. For example, before you counted, did you ever play in a casino on multiple times, playing perfect basic strategy, and clean their clocks? And almost think B/S was enough to let you win? Until the house edge caught up and ground your winnings away? I know way too many BJ players (non-counters) that actually think they are winning, because they remember the big wins, and forget the more frequent (but smaller, usually) losses. And we all know they are playing a losing game. And that "feature" is what keeps the casinos in business. If you lost 50 cents for every $100 bet you placed, nobody would play that game very long. But if they can lull you into believing that you are winning, or you can win, then they have a long-term customer base. Somehow human psychology lets us sit at a table with 5 other players, and one wins big, and we think "this game can be beaten (not by counting)" even though we actually noticed that 4 lost money and only one won. But we don't think "80% losers, 20% winners, this sucks." We tend to think "that winner could be me..." or "I can do that..." and away we go.
I've learned to play with "plastic" when playing BJ. I don't think about that green chip being 25 bucks, it is just a "n-unit" process which helps me keep my sanity. Of course, I can't play at anything but $5/$10 tables with my wife, as the blue marks on my arm from her "grip" can be painful because she _does_ equate "green" = "$20 bill + $5 bill"... :)
The typical gambler can instantly answer the question "what was your biggest win at the BJ table?" But beyond that, their recollection is very vague. The typical counter probably also remembers that "biggest win" but for me, I also remember those big whippings I've endured as well.
That's what mostly impresses me about the "pro" players. Not their counting skills, as I'd match my counting skill against anyone. But their ability to weather the storm on those negative swings is impressive, particularly when I know that there "negative swings" are huge compared to mine, since our betting levels are far different. Just the same as I am impressed by the rank-and-file pro football players, because I know what they endure every week, and then they bounce back for the next week... Tough life that requires a form of toughness (football or card counting) that most people will never fully understand or appreciate...