Another key variable in this equation is your table image as well. The big stack 8-9 hand is much more effective for the strategy discussed when you are playing an aggressive style and taking a lot of pots.
When you hit the straight or flush with the 8-9 and you are seen as an agreesor, you are likely to get significant action from an overpair, top pair top kicker and (depending how you play the hand) you will likely get one round from 2 good overs like an AK / AQ as well.
With a tight table image you will likely get one round from each (unless you flop it Q, J, 10) because the other possible cards on the board are unlikely to have made the hand of a tight player. But a sizable bet on the turn or river will begin to smell an awful lot like over pair or set and you will likely not see big action from many of the hands mentioned above.
Author mentions there are many factors which go behind each decision, but I think this strategy is implicitly relying on having a good understanding of your table image
When you hit the straight or flush with the 8-9 and you are seen as an agreesor, you are likely to get significant action from an overpair, top pair top kicker and (depending how you play the hand) you will likely get one round from 2 good overs like an AK / AQ as well.
With a tight table image you will likely get one round from each (unless you flop it Q, J, 10) because the other possible cards on the board are unlikely to have made the hand of a tight player. But a sizable bet on the turn or river will begin to smell an awful lot like over pair or set and you will likely not see big action from many of the hands mentioned above.
Author mentions there are many factors which go behind each decision, but I think this strategy is implicitly relying on having a good understanding of your table image