What you have to remember about Luke is that he's been injured for pretty much 3 of the last 4 years and is, what, 4 games back into his NRL career? He's been getting better week in week. Lets see how he's progressed over the next month and talk about him then.
On the same note, when Tom came into the team he looked solid if unspectacular. Now he's having a similar impact to George when he takes the ball up. It may be a season too early but jeez, these 2 are going to carry that South (and the Test) pack for years to come.