DS is 14mo and still has pureed food. I cook it myself however, so it's not totally runny like the jars. At mealtimes he is very hungry and has neither the energy or patience to chew his way through an entire portion. He is very capable of solid food, chewing on scraps of our food once he has scoffed his own. He like to chew on either a biscuit or apples for snacks, but only really started doing this when his molars had completly emerged (13mo).
I wouldn't worry about it at all. Keep offering him the pureed stuff. He'll move onto more solid stuff when he's ready. Like you say, if you push him too soon you run the risk of him developing a food phobia and potentially not getting his full spectrum of nutrients. From a developmental point of view, you can't expect him to sit at the table for more than 10 mins, and it would take a lot longer than that for the poor mite to chew his food.
Be very careful of heeding the HVs advice - they are notorious for talking out of their arses when it comes to this sort of thing!