So then where did this come from?

"Erm... I posted an e-mail by Sam Stewart stating that the MIU WI still comes under the whole "no duplicate half actions in a turn" rule, despite it being a free action, which makes it the same as the Storm Quality."

That was the e-mail response I got. My question was whether the free action attack by the MIU WI counted as a standard attack for the purposes of the half-action rules.