Let's do some happy math time here
Straight from the statistics at the bottom of MMO-Champion:
Members
383,258
Active Members
30,594
So let's assume we're working from the 7.7M subscriber number.
That means that the total membership of MMO-C amounts to 4.977377% of the subscribers.
The active members computes to 0.397325% of the subscribers.
Let's go a step further and say that only about 10% of the active members actually post on threads involving game play. That now comes in at a whopping 0.03974% of the subscribers.
This, of course, is all assuming that 100% of the current members referenced above are still actively playing WoW, and 100% of those members completely support the idea being brought forward. Any statements claiming that "the players want this" based purely on the fact that it's posted on MMO-C are most likely not the case.
Saying, instead, that about 1500 players (we'll go for roughly half of the "10% of the active members") support this idea, and then taking that number to Blizzard as the basis for the immediate implementation of said idea is probably over-stating the number of players who would actually jump at something