Low flow for shorter than you think should get you to sufficient oxygen (i.e. 0.25 lpm for 30 seconds in 5 cold gallons should give 8+ppm). Then again, for homebrewing the "realm of reasonable" is HUGE - from doing nothing, to mild shaking, to aquarium pump, to 2 lpm oxygen wand for 2 minutes - it'll all produce a finished beer with little to no discernible difference. From a commercial standpoint, consistency in finished product is key and yeast health is very important from an expense standpoint, therefore the steps required are dictated differently than at home.
Same as oxygen. You're throwing grenades at the wort - even somewhat close is well within the margin of error for screwing up the batch. But again, from a commercial standpoint, things are dictated differently than at home.
Sometimes the more you know, the less you know.
Ignorance can truly be bliss in homebrewing
(not so much in commercial brewing
) - luckily this is a hombrewing forum!!