Yeah, almost all the Arrancar kept human size even after resurrección, even Fracción, so that doesn't hint anything.
Masked was not written by Kubo (the only databook he wrote was Color Bleach+) and was already contradicted in the manga, so the "most are Vasto Lorde" shouldn't be taken seriously. But from the manga and special chapter we know Baraggan and Ulquiorra were both humanoid hollows and Harribel was confirmed a Vasto Lorde in the anime, so I assume 1-4 were VL.
@Daz:
Thats not known for sure. All we know is that in his flashback he was; that might've changed later.
Urahara stated the Arrancar who invaded the Earth were Adjuchas and Gillian*.
Regarding Grimmjow's Fracción, remember Adjuchas can revert to Gillian, maybe that happened to them and they somehow managed to regain their individuality after becoming Arrancar? The reversion concept was introduced on the same chapter they were revealed as Adjuchas, so it's possible… although I wouldn't be surprised if it was a brutal retcon.
*= wait, what about Ulquiorra?