If I had a dollar for every time I heard that one out on the field, I could buy a round of drinks. I usually tell them that the wind is too variable in that spot to fly with any stability, and they buy it hook, line and sinker. It really makes me want to laugh out loud, but that would be quite rude, so I wait until they are out of earshot. Then I go into ROFLMAO mode.
Hi, Scott, and welcome to the forum. It's good to have you on board.
Before you buy a UL or SUL kite, check in with the flyers here. Some will suit your style better than others. The experienced dual-line pilots here can save you some time and grief (intentional Charlie Brown reference).
I think the delay is slightly over-emphasized. You have more reaction time but the kite isn't necessarily going slower, it's just going further through the air to close the same angle in the sky. As you get outside the inner cone of the wind window, ling drag becomes a factor in sail performance. While a dive stop may be 150' long, it is still screaming towards the ground and angularly your brake action is the same.
The kite will react gracefully instead of aggressively.