I'm almost certain that the percentage is quite a bit lower than the poll reflects at the moment. What we often fail to take into consideration on polls such as this, is that one particular side is often more motivated to respond than the other.
In this case, CTE users are generally very interested in increasing the awareness and acceptability of their systems in the mainstream pool world and would be far more likely to vote. Those that aim by feel or ghost ball are more likely to just think "yeah I aim like most of the rest of the pool world, so what", and would generally be less motivated to offer their opinion or to vote.