Well, those guides are made for people playing by themselves, not for a 5 man group with a 70 on the side like some of us are doing.

I do agree that the guide are awesome for Outlands and late 40-50s, but most of th early quests are focused onto grabbing quest items with medium to low drop rate which sucks for 5 manning. If there were a 1000 targets in front of me that I could kill non stop, it wouldn't be much of a problem, but since at low level a 70 would kill too fast and need to wait for respawn, you end up running around more than actually killing stuff.

So I believe that running instances for the first 40 levels is better than questing IMO, but I think after SM, ZF is ok for a while, but questing gets better after that all the way up to 70. Currently I'm like 30% off behind the guide in Outlands at 63, because I skipped some or most of the item drop quests, I always check to see the % on the drop and the location and number of monsters available before deciding to do them or not, I'd rather run an instances and do some quests in there instend of just running around looking for special targets, or swimming in the water for an hour killing fishs...
-D