Edit: um, now that I have B2, I can probably do a bit of research on it. It'll take me a while, but by mid-November I should be done. Sounds okay? Also, you may want to add a section (or a separate article, I can help with that) for PWT?
Uh, I have some research done; essentially, I recorded the battle videos and uploaded them, then reviewed them with Pokecheck's Vs. Player, which has so far proven itself reliable when it comes to other IVs. The results can be found here (not much though, sorry).
"The IVs of Subway Pokemon, however, vary depending on the current set being challenged. The IVs of Pokemon used in the first set (battles 1-7) are 15, 20 for the second set (battles 8-14), and 25 for the third set (15-21). " - Your Guide
This is false, according to the little research I have done.