3-pt Attempt Signal

[crosscountry55]

I've always been trained that the 3-pt signal is a straight arm at a 45-60° angle with three fingers extended. However, at camps last summer I noticed a few guys instead using an arm with a 45° angle at the elbow, and vertical from there on up to an open hand at the top (rather than 3 fingers). Now I'm seeing more and more D1 officials use this signal as well.

Is this a fad or did someone's mechanics manual change recently?

If it's a fad, what do y'all think of it?