Let me try to justify my position a bit, since I still don't think affliction suffers more from interrupts than any other dps spec. Basically the argument is that you lose comparatively less overall dps because frequent movement will mean that you lose a lot of your low dpct fillers, but you still cast the high dpct spells often enough.

I ran a quick casting simulator through the conditions that every time you attempt to cast a spell, there's a 20% chance that you get silenced for 5 seconds -- pretty unfriendly caster conditions. If you are a caster with a single nuke like TBC destruction warlocks, then your dps would go down to about 66%. If you chaincast a shorter spell like Scorch, your dps goes down to 55% since in this model you get more chances to be silenced.

Under the same conditions, with a straight affliction priority queue (not factoring in lifetap), you:
* Cast Haunt 87% as often
* Manually refresh Corruption using 1% of the overall time
* CoA uptime decreases to 92% of original
* UA uptime to 87%
* Immolate uptime to 77%
* Siphon Life uptime to 84%
* Cast 43% of original shadow bolts

A huge amount of the loss comes not from your DoTs falling off, but from not casting nearly as many fillers; you end up with about 70% of your former dps which is just as good as the complete non-ramp version. I didn't include lifetap as a filler in the simulator, but that should also swing in movement/interrupt's favor since people can and do tap while not dpsing.