Mousey said:But... but... but... "the card you selected is highlighted". If the win/lose decision has already been predetermined by my clicking the Double button, I don't select anything!
Whatever card you do click on will be displayed as the already chosen card.
So, you click double. The dealer deals himself a card - let's say it's a Ten, and then it deals you a card, let's say the King of spades. It then deals three more cards.
It then displays its ten, and four face-down cards. Whichever card you click on will be displayed as the King of spades. If you clicked card one, King of Spades. Card three, king of spades. The other three cards (the ones you didnt click on) will show as the other three that were dealt, and which never made any difference.
If you don't click on anything - let's say you just closed the casino - it won't matter, because your balance will change the moment you click double, because the server already knows that the dealer has a ten and you have a king so you won in this example. The card choice is just window dressing.
Deceptive it may be, but it really makes no difference to anything whatsoever. It's like saying a coin flip uses a 20p when actually it's a 50p. Who cares?