All that took around 4 hours of play time, give or take a bit. Now that she's at honored, she's opened up the Rampaging Giants repeatable quest as well. Doing all three will probably take a half hour or so, and net 850 (935) rep per circuit. That's a total of about... 35 circuits, or another 17 or 18 hours of grinding.
Yowch. Apparently, the quests used to reward only 50 rep each... which means that the current grind is about 5-6 times easier than it used to be. Thank you, Blizzard.
I'm glad that Blizzard has learned a bit from their previous expereinces. Killing the same mobs over and over for 20 hours isn't really challenging, or fun. Doing the Kalu'ak or Sons of Hodir dailies were, in comparison, at least a little challenging, and a lot more fun. They still required a time investment to complete, but at least you got to do a bunch of different things along the way.
Here's hoping that whatever rep grinds we see in Cataclysm are more interesting and fun than killing chimeras and wondering "Where's the beef?"