I attempted to answer this in this post; did you see it?
I indicated what my motivation was. First, the new article was an extension of the past two...essentially the same data was presented, although I did add some "farkles" because I like doing that. Second, it had been over 10 years since the last time oils had been looked at in our organization...had anything changed? Third, these oils were all the ones people have been touting on various forums. For me, I wanted to see how they really looked on paper. In my estimation, most faired well, but some really didn't look so good.
As for convincing people, that's for each individual to decide. For me, I'll probably switch from using BMW's petro oil to Spectro's brand. I can find it locally and it's even cheaper...and better to boot! I decided it was better for me.
As for more in-depth testing, define for me the "top selling oils". That can't really be defined...that's another whole thread! You mention another brand doing some tests. You're probably referring to the June 2009 AMSOIL pamphlet that can be found on-line. They did a ton of testing and I applaud them for it. Much bucks, though. And yes, it did show that AMSOIL was pretty much the best of the bunch. Some of the oils I tested were in that same article, including AMSOIL.
The testing I did (and Matt and Jeffrey in the past) were done independently with no vested interest. There are other on-line tests and discussions...done at different times by different labs using much different oils. What I present represents a snapshot in time of most of the oils that we use.
As you said, most of the oils performed well in this limited testing. I could have included car oils which would show up poorly...but we already know that, so no need to do it. So, in the end, it really comes down to using a quality oil and changing it often. If the article can point out there's an equivalent oil that is better in some aspect and it might be more easily found in your area and it cheaper, that's a win-win-win!