More and more often, I'm seeing "lag" used transitively: he lagged his classmates, income lagged expectations, etc.

I always want to insert "behind", as to me "lag" is intransitive.

I've consulted several dictionaries, and only one lists a transitive usage with the same definition as the intransitive usage, and provides an example similar to those I've given above.

Just wanted to hear what y'all think. I don't want to be overly pedantic while editing, but at the same time I feel I should at least suggest adding "behind".