Oggy is correct, if you don't use it, you're losing a fairly substantial amount of dps, it isn't minimal at all. Also, the rule of not using FF during BW is now incorrect. If you want to use it optimally, use it with around 3 seconds or so left on BW, especially if you are running low on focus during this time (you should never cobra shot during BW). It will restore 30 focus to your pet, giving you more bites during BW. Although, using it like this, and just using it after BW, is indeed a minimal dps gain/loss.
for the casual raider 11k is minimal just saying. 11k out of 300-400k isn't exactly ground breaking.
For the casual LFR/normal raider then yeah, it probably wouldn't be viewed as a big deal, but those players are not likely to reach those numbers anyway. Anyone who is running heroic content, at any standard should see that as a sizeable chunk of your dps that is being lost all due to not pressing a button once maybe twice a minute.