Bob's explanation is right on. It all comes down to what is your comparison. I've been playing with 314's, Z's, I-3's, and Z-2's for almost 10 years now. And I KNOW they deflect the cueball. I often let people try them out, and they will tell me they have ZERO deflection. And many of these guys are shortstop speed.
I can make the comparison the opposite way as well:
I am so used to low deflection shafts, that when I play with a normal shaft, my perception is that I almost have to aim to miss the whole object ball. I know players with normal squirt shafts don't think the same way, and think I'm crazy for stating how I aim with their shafts. Well I think they are crazy when they tell me my low squirt shafts have ZERO deflection.
After tuning your game to a shaft, your eyes get used to it. When switching to something drastically different, your eyes will be giving you false impressons of aim.
I can make the comparison the opposite way as well:
I am so used to low deflection shafts, that when I play with a normal shaft, my perception is that I almost have to aim to miss the whole object ball. I know players with normal squirt shafts don't think the same way, and think I'm crazy for stating how I aim with their shafts. Well I think they are crazy when they tell me my low squirt shafts have ZERO deflection.
After tuning your game to a shaft, your eyes get used to it. When switching to something drastically different, your eyes will be giving you false impressons of aim.
Bob Jewett said:Early in my learning process, I was using a cue with lots of squirt. At the time, I didn't know that such a phenomenom existed. I happened to leave my cue at home once, and had to use what must have been a low-squirt house stick. To me it felt like the cue ball was crossing over the line of aim by a lot, so that if I had known what to call it, I would have said that it was a negative-squirt stick.
The problem is that most people judge squirt by where they aim on spin shots, and that is nearly always by feel. I think a stick might feel like zero squirt if it is 1/2 or even 3/4 of the squirt you are used to.