No, I disagree with that. Vasto Lordes haven't been explicitly defined since their inception. If only ten were needed to destroy all of Seireitei, and Aaroneiro was the only one not a Vasto Lorde, none of his Espada would have had any difficulty in defeating their enemies like they did.
I can believe that the fourth and up Espada are probably Vasto Lordes, on account of Ulquiorra's appearance being similar and Aizen banning their use of Ressureccions under Las Noches, but in any event, it's never been stated that they all are.
I think it's implied that the 6th Espada became a Vasto Lorde...
Where is this implied?
Well it looked like he became one when he ate all of those 2nd level Hollow guys (I forgot the name but it's between Gillian and Vasto Lorde) I might be wrong though.
Now for the new chapter: