It could mean there bloody good bats..... Or merely that more people have owned grays than other bats.
I got my other 2 tons with an oblivion extreme pro too....
I'm subscribing to the a lot of people have owned them theory.
People who don't come on here will likely buy a bat from a big brand. To most that would be Gunn & Moore, Gray Nicholls & to a lesser extent Kookaburra or Slazenger.
If people bought their bats before becoming a member on here (or before this forum existed in some cases) I imagine they would've bought a bat from one of the bigger brands which could explain why so many first tons were with GNs