Pick Clean... tooltip incorrect?

[zeopower6]

Sometimes at non-yield bonus nodes I get +3 or +4 on Pick Clean... is there some hidden factor to the bonus that it gives? It seems a little odd.

[Liam_Harper]

Seems to be a bonus, applied randomly. I've never seen a +4 to Yield though (which would be 5 items per gather), only +3 (4 items per swing).

The bonus can apply right up to ShB nodes but will only apply to items already at a +2. I opened a ShB node once where the lv71 item and the Crystal gained a +3 but the other items which are usually +1 stayed at +1.

[Callinon]

It's based on Perception, but I don't think anyone's quite worked out the breakpoints for it yet.

[zeopower6]

It just says 1 or 2 in the tooltip but have seen myself and friends get +3/+4 sometimes and inconsistently on node that don't have any yield bonus. So strange.

[Bsrking5]

I haven't seen a +4 but I have seen +3 on gathering chance up nodes, like for silver ore.