I don't have a Yamato 1/60 VF-1, but I own a Yamato YF-19 25th Anniversary, this one is about 34 cm long, it would be 20.40 m real scale, and that's wrong, at least Macross Compendium says: "Length overall: 18.62m". Seems, like Yamato YF-19 is about 1/55 scale and Bandai got it right.
Also, i have a small car, a Lamborghini Murcielago, on its package reads "1/60 scale". The pilot of YF-19 it's too big for the car, and VF-25's pilot seems ok with it.
Happy New Year!
BTW: First Post.