Donation of primary or secondary?

[RainPilot]

I came across this article which makes this statement : "The majority of experienced divers agree on using the regulator from the mouth technique if their buddy is without air. But when divers are being trained, they should always learn to offer the alternate air source." Here's the original link- What Are The Rules And Recommendations For Your Alternate Air Source? - DIVE.in

I'm in the primary donation camp but pretty sure I was trained to donate the octo when I did OW 18 yrs ago. We also practiced buddy breathing. What is the standard protocol taught these days in OW- or does it vary depending on agency and instructor?

RAID teaches primary donate on all courses. Hose length setup will vary by location and student needs but long hose is encouraged where practical.