Loving it! Carn Boston Rob ;-)
I think Rob will definitely make the merge, but probably won't go much further. Russell will either go out first on his tribe, or be one of the first out at the merge. If these people are smart, they wouldn't trust Russell or Rob once it gets to the individual portion of the game.
I personally don't think either one will be the first to go as they bring experience to the new contestants i.e. building shelters, fire etc. but then again stranger things have happned I thought Dan would be the first gone last season but he limped his way into the final 5 ...literally.