Clan Chiefs and how they pleat their kilts

[Kiltman]

Actually, the more that I look at the photo, the more I'm thinking that this kilt may have typical narrow pleats, but be pleated to alternate lines, mening the yellow/white stripes only appear on every other pleat.

Yes, I believe you are correct. If you look closely at the photo it appears that the pleats are narrow and alternate, this is most obvious by looking at the lower part of the pleats.