Does it even matter? I decided to level up herbalism/inscription on one of my characters, and it seems as if Blizzard has drastically increased the old-world resource spawns in anticipation of Cataclysm. It was not unusual to spot two or three nodes within the mini-map range, and moving to gather one would often highlight one or two others. Zones like Feralas are a non-stop gathering bonanza. Getting to 300 in a tradeskill that depends on herbalism or mining should be easy. I didn't slow down until I got to Outland, and by then my herbalism skill was something like 360.

Outland resources (herbs, ore, skins) might be a huge money-maker in the next few weeks, as all of those goblins and worgen hit Outland and start fighting for the relatively scarce resources there.