Nick, nobody said House is a slow starter. He's just a streaky shooter, whose shot is off for stretches and hot for others. In his first season in the Celtics he shot 42% from distance pre-ASG and 35% post-ASG. Nobody said that he normally has stretches like he did in the 2nd half of last season - he wouldn't be playing for $2.5M if that was the case. But House has shot above 37.5% since his 3rd season in the league and at or above 39% in his last 5 seasons, so I think there's a good chance that he'll end the season with those kind of numbers once again.
eja117, role-players are supposed to fill roles. While in a vacuum Robinson is a better player than House and for some teams he'd be a better player, I don't think the Cs are one of those teams, because House is, by far, a better shooter on the catch. Robinson's skills would be redundant in this team: he's certainly a better shot-creator than House, but the Celtics have like 5 players that are better than Robinson. If you're asking Robinson to do what House does - play off-the-ball, the 1-3 ballscreen, shoot, spread the floor, guard the opponent PG - then I'd rather have House, because he does those things better or at least as well as Robinson. I mean, do you want Robinson controlling the ball and Pierce on the corner waiting for a shot? Is that better than Pierce controlling the ball and House spreading the floor and waiting for a kick-out? No, it isn't.