I have more observations/unanticipated goodness regarding recruit a friend, after my long weekend of experimentation.
First of all, triple experience is off the charts awesome. My first full fledged buddy character left ghostlands around level 24 and didn't even complete all the quests. He is currently in the middle of a 2 priest team and I think I'm going to level them a bit the old fashioned way. My other priest is 27, so when they hit 30, I'll run through some 1000 needles and STV kill quests, then we"ll take them through scarlet monastery.
I have decided the sweet spot for leveling is around level 40. Two 60's on the buddy account can level 3 40's on the main account to 60. Conveniently on my horde account I have a priest, shaman and hunter awaiting leveling goodness. I wasn't going to bother with a hunter, but why not? Plus hunter makes an ideal main to have a buddy character in tow and I think 2 characters and a pet just might make people think twice about ganking him.
I have also figured out an unanticipated benefit for the RAF summoning. Want to get someplace and not worry about the hassle of a run or lengthy flight? I have a mage on my main account bound to shatt. He can get anywhere and summon a buddy character. Another alternative is to do that, and then have one of the buddy characters summon someone from the main account. Instant travel, no fuss. I have been using that method to bypass a lot of painful travel (i.e. thunder bluff, the coast of ashenvale, and I'm sure I'll use it to pick up the flight point in gadgetzan). I also used it to get my Orc hunter and Tauren druid into the blood elf territory for leveling.
This recruit a friend is so addictive, I pretty much havent even been playing my higher level characters. I am sure I will pick them back up, my pally needs a few shards, badges and some rep for me to get 2-3 pieces of BoA gear, but since I only have a 90 day window to get a bunch of 60's (I need them horde and alliance, just in case, no reason not to get both servers up to speed), I want to make the best use of time that I can. I actually think it will be more fun on alliance because I can do more questing and less instancing. Although I know running through instances is time efficient, it is hella boring, so questing breaks up the monotony.
2 years ago