mage pets - no difference in dps ?

[Vosooth316]

im a lvl 35 mage now and ive noticed all my pets hit for the same cap and same dps overall. i had someone parse it for few hours and he concluded they were all 13ps. this guy is also a 60 mage and said he parsed his whole time leveling and no difference until 50+ for pet dps.

anyone else see this?

so basically its stun, root, or dd? no point to ever use water?