I think it's more based on his form at Plymouth.Azaz it's way too early to say he goes in our best 11. He might, but currently I think he's benefitting from being a shiny new signing in some people's picks.
He got himself in some good positions against Rotherham, granted he should have got a goal but he made good runs and ended up with 2 really good chances. If he keeps doing that, he'll get goals.