RoM and Tom. there's several different poker games. The one RoM is arguing about is Stud 8. The one you're arguing about sounds mostly like classic poker.
Texas hold 'em can be card counted too, since you can see more cards. Classic poker is rather difficult to card count since you can only count your own cards.
In stud 8, every player gets 5 cards on hand, with 2 cards placed in front of them. The goal is to get the best 5-card hand with the 7 cards you have, or the best lowest hand. Naturally, it's rather easy to count the cards in this situation. With 5 other players, there's a total of 10 cards viewable on the table. Addinf your cards to it gives you 17 cards. So counting cards become easier, sicne you can play the statistics to figure out hwat works best.
In classic poker, you only have your own cards to count. So 5/52 to start becomes harder to count. But I do believe everyone unconsiously plays the statistic in normal poker aswell. I know I do.
In Texas Hold 'em, it's a bit more difficult to count the cards. The rules here are simple. Every player get 2 cards, and 2 are placed on the table. Every player either passes, or goes with the betting. When 3 cards are on the talbe (betting round 2), the players can decide if they want to see the others. If not, the game continues. At the last betting round (4), there's 5 cards on the table.
So counting cards in Texas Hold 'em is also playing the statistics, where you consider your own cards, and the cards currently on the table. Easiest to count cards in is Stud 8, though. Besides, I wouldn't say a roughly 1% edge over other players (which one of the links you provided stated) will make much of a difference in a game that's mostly about luck. Granted some skills are required, but luck is still a huge part of it. Even card counting, you'll still have the same cards as oyu otherwise would in Stud 8, so the only edge card counting gives is to know that the propability that you have a higher/lower/better hand then someone else, and even then you can be unlucky that the lowest probability was the correct one. Counting cards won't suddenly give you a 100% chance to win like in Black Jack (Well, not even then, but it have a huger impact on Black Jack)
So you're both right. Stop arguing about card counting already, geez. RoM were talking about Stud 8, and Tom were talking about classic poker. Problem solved. Can we move on?