I'll give myself an out and say 99.9%. There is one version and two prices. And, I don't work for Adobe.
As long as I've been using Photoshop Elements, Premiere Elements, Lightroom, Photoshop and Bridge there has been a student discount. That is about 5 or 6 years of trolling related forums. I've never once read where anyone got less than the full deal. On the other hand, I've read that Adobe tries hard to make sure you are not faking it as a student. Some have posted that they were not able to pass the "student" test.
For the Elements products, there are usually holiday or fall sales that make it as cheap, or cheaper, than the student/teacher price.
Do you know something I don't know?
Good luck!
Bill