A yarn forward is the same as a yo IF the yarn forward is followed by a knit stitch. Sometimes you put the yarn forward to slip a stitch, or do different things with the pattern.
I think the difference in terminology depends on which side of the ocean the pattern's from.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry