Found this out while we were running a few alts through icc 10 for gear.
If you start the encounter on hard mode and durring the rp change it to regular saurfang will start the fight with 100 blood power. This would normally make the encounter slightly harder but he will not cast mark of the fallen for around 45 sec and it seemed to mess with his other spell timers as well.
I plan to test this from regular to heroic next week if it works both ways it may be helpfull because people could burn him through the first set of beasts without worry.