I think I remember the durations on their boons to be really short, like 10s, but now they are 15s, giving you very high uptime or might or fury with Concentration Training.
Unfortunately Concentration Training seems to be bugged, as it will not trigger unless the pet is in combat (so you can be in combat yourself but unless the pet takes or gives a hit it wont trigger).
Also Anet has yet to fix the issue F1 abilities sending out the pet to attack when its on passive, making Moa/Jungle Stalker/etc F1s clunky to use if you only use pets for their buffs.