You miss-represent my statistics. Your data is over 14 games, mixing AD and AP Ezreal. My data is over 126 games, only consisting of AP Ezreal games. That said, I also believe you can get anything to work in Bronze and Silver if you work at it.
The best evidence that I've seen will probably be un-accessable again. Champion.gg shows only data on Plat+, and having watched the Ezreal Mid stats for a while. Every once in a while, the highest win rate build would be something distinctly not AD. No AD Ezreal maxes W first, for example. The builds could never get enough following to become the most popular build, but it was enough to suggest that others were having success with it. I want to say that the AP Win Rates were in the 50's, but I can't remember for certain, it may have been only 5% higher than it's AD counterpart.
Unfortunatly, I don't think Champion.gg retains historical records on these things to go back and check the numbers.
It's safe to say that Runeglave will result in more people playing AP Ezreal, even after the 5.13 changes to Runeglave, now that they've seen it's damage. These players, plat and above, will find ways to refine the build and their execution. We've seen that while the AP Build can put out a lot of damage, it's not unbeatable, nor is it lacking in counterplay like some older AP builds (AP Yi, for example). At worse, Riot will probably nerf AP Ezreal in some way, but they will not remove a build that can be balanced simply because it's easy to delete his AP Ratios.