The only thing to worry about waiting to introduce meat is the iron that it provides baby at that age. If you are giving formula, it is supplemented with iron, and this won't be a concern. However, if you are breast feeding only, I would recommend a vitamin supplement with iron if you choose to wait to introduce meat, check with your pediatrician for brand recommendations and before starting the supplement. Babies need iron for brain development. I would also talk to your pediatrician about adding meat to his diet in case she has some suggestions.
I started my son on meats around 7 - 8 months, and I used a baby food mill to grind his meats, that way he didn't have to chew it. I would grind chicken, turkey or pork (lean cuts - pork tenderloin for example) and mix it with cottage cheese and he loved it. He also LOVED spagetti ground up with meat, vegi's and noodles. I also only fed him what we were eating, and he now eats all his meats well at 18 months. I think that by feeding him what we were eating, he got used to the tastes that I cook, which makes it easier to feed him now, versus the picky meat eater who will only eat hot dogs or chicken nuggets :)
Good luck!
J.