In this thread, people are arguing as to whether 10k dps is sub par or not:
http://us.battle.net/wow/en/forum/topic/2842565593?page=1
As you can see, much of the posters believe that Shadow Priests can be excused for low 5 man boss dps, due to the state of their spec.
What I am asking is; Are shadow priests REALLY only capable of doing tank-level dps in 5 mans? Is the spec THAT bad? I personally do not believe so, since I have two shadow priest friends who are perfectly capable of doing 14k minimum on most fights. Plus, with a 15% damage buff in randoms, I don't see how 10k dps is a reasonable amount for a Zul' Aman or Zul' Gurub boss.
So, are shadow priests really that bad, or is it just people making excuses?