To what extent do visit weekends impact graduate school applicant's final decisions? Is there any study/survey that tried to quantify to what extent visit weekends impact graduate school applicant's final decisions? (final decision = which school to attend)

I mostly interested in the computer science field in the US, but curious about other fields and locations as well.
I visited 5 schools as well, and did not choose my "dream school" because of visits. I had actually started doing research with a professor there (and it was published during my first year of graduate school), but during the visit I realized that the department was not what I was looking for. One big thing that got me is that, on paper, they (and every program) seemed "interdisciplinary", but when you talk to them you realize that the "math biologists" don't talk to biologists. Add that the students seemed to not be interesting and I started thinking that, although it's a top school in the field (math), I wouldn't graduate as the person I would want to be.

The other program started with biologists and mathematicians together in the same courses, then you split off after the first year. Everyone was really interesting and I kept in touch with them after the visit. I met with a bunch of professors one-to-one and found about 6 I would like to have as an adviser and already had projects I wanted to start. Lastly, they showed the funding statistics and showed the available computing supplies. I got the impression that this school would really help me become who I want to be, and so I chose this school.

Then again, some people choose simply by the ranking.