I wouldn't do it. I'm not an avid hunter and never will be, but I also just could not send my puppy away like that. An adult dog? Maybe. A puppy? No way. And, I really enjoy training him on my own. It's not hard when they have a natural ability. And it is SO MUCH FUN! All you need is a good trainer and a couple Saturdays a month.
Why not just train him yourself?
There are tons of resources and opportunities in your area to do just that. And, training is bonding! It's so amazing to watch them learn and grown right in front of your own eyes. Unless you're a big-time hunter (it doesn't sound like you are but I could be wrong) what's the big hurry? It might take longer to do it on your own, but it'll be less expensive, you can keep him at home, you can determine the methods you want to use and stick to them, and the opportunity to bond and create an amazing relationship will be yours.
If you do decide sending him away is what you want to do:
Have you visited their facility? See how the pup is going to live? Are you happy with that?
Have you seen them work with and handle their dogs? When you go out to watch, have them show you a lesser trained dog, not their superstar. Have them show you how they handle a pup or a frustrating dog.
What are the methods they use for training? Are you OK with those methods? An example question might be: What will they do if your dog won't go into cold water?
Have you asked about the trainer from someone you know?
Have you talked to your breeder for recommendations?
Why not start him in the puppy program? He is young, right? And he hasn't been started yet, so these seems like a better place for him to me.
I would also suggest that you get involved in your local Lab Club and/or even a local hunt club and see what's available to you, what you're interested in, and talk to people you know, trust, and respect about trainers. Rose City Labrador Retriever Club and Oregon Hunting Retriever Club are two you should look into.