Okay, if you do 10 mans and you clear it all and it's just as difficult as 25 man, more or less, but the ilvl is higher in 25 mans... I guess my question is... why the hell would I care? so the people in 25 man have a higher ilvl than my guild in a 10 man, yet I can still effectively clear 10 mans... I don't see why I would care? Unless I was doing 10 mans and we couldn't clear the content, and we needed 25man ilvl stuff to do it, which isn't the case. So it doesn't matter, does it? except to feel like you're amazing because you have a higher ilvl than someone else in a 10man, which isn't much different than bragging about having a mount someone else doesn't have.
a higher ilvl in 25 man isn't going to make more people transfer from 10 mans to 25s, unless 10 man content is made much easier.. in which case, it STILL might not change their minds.