Sounds about right, but the other (and often main for Tau) reason to run is if you need to claim an objective.
And as this guy who was teaching you seems a bit confused there's another important thing to remember (which even seasoned players don't always know about jet pack units). When you do a fall back move you only do the regular 2D6". Some people will get mixed up with jump infantry (who have a 3D6" fall back) but jet packs, like your crisis suits, are a separate thing entirely. I suspect the guy teaching you might have been getting them mixed up with jump infantry, hence pointing this out just in case