Now I know a lot of people swear by this latest claim, but so did many others back when it was all about the "color of the nearest owned gym" and "eevee's movest" were the keys to triggering a specific evolution, so I decided to put it to the test.
It worked all 3 times for me
Did you get same one three times in a row? I had one of each and tried get a second Vaporeon, but got a second Jolteon. I tried again and got a second Flareon. I'll just let my next Eevee evolve on its own ...