If you want to want quick info to participate in a raid those short guides are great.
If you want to form a tactic that fits your raidgroup with in depth knowledge or you have specific problems with a fight those long guides absolutely rock!
@gabestah: At Thok you can use stuff like "Devotion Aura" to avoid interrupts. I also heard that you can use the entrance-area for kiting.
Maybe it helps :P