They said the same thing about Rask coming in, but he was only 6-1, 6-2 and doesn't have the huge reach that Roy does to make up for it. I don't think Roy can be a big scorer for a few years but he does play a physical which sets him up to play on the 4th line and maybe get some PP shifts as a net-front guy.
There is more than one speed that is slow. I think Rask would look like bottled lightning next to Roy.