My reaction to this totally unscientific survey is based on the following points, which represent my opinions about the makeup of posters on forums like this:
1. I think that WDW guests who are obsessed enough with Disney to post on boards like this represent a tiny sliver of all guests. I have no idea what the actual percentage might be, but I suspect that it may be less than 1%.
2. This tiny sliver is dramatically and disproportionately overpopulated with people who have made several, if not dozens, of trips to WDW over the years, including several in recent years.
3. Guests who make frequent trips, and who post on forums like this, are much more likely than an average guest to have developed a touring approach that enabled them to take maximum advantage of the paper FP system. It stands to reason that a significant percentage of that group will be disappointed with a change that takes away an advantage that they held over the average park visitor.
4. Just because those frequent visitors complain loudly and frequently about FP+ does not mean that they will visit WDW less frequently. And, even if they do, their impact on the overall WDW attendance will be imperceptible.
I find it interesting that 21 of 24 first time visitors who responded to the poll said that their trips were as good as or better than they expected. Of course, it's impossible to tell if those people spent time on the Dis before their trips and had their expectations beaten down so badly by the negativity that they were dreading their trips before they left and were relieved that it wasn't as bad as they feared. However, the comments from those who took the time to explain their votes suggests that wasn't the case.
BTW, I voted for "as good as previous trips" because our frequent visits have created a degree of familiarity that makes it difficult for one trip to be really "magical". I am looking for a level of recreation, entertainment, and relaxation similar to what we have had on past trips, and am perfectly happy if I get that. I prefer FP+ over paper FP, but its impact on my overall enjoyment of a trip is negligible.