I tried a google search but was not as sucessful as you are. I am going to take the rubber stopper out of a vial of EO that I have had for a year that is laying on it's side, so the stopper is in pure EO and has been for over a year. I am curious to see what it looks like.
That will be the test for me - I dont care what people think or assume - if a rubber stopper that has been sitting in EO for over a year shows no signs of Deterioration then I am not going to get paranoid over it. This is a statement about the rubber in syringes - so I am going to test that myself as well. I will take photos of my experiements and post them up.
Now you guys have me curious, but I am not waving the white flag yet.