This is NOT uncommon! I did this when I was a child and my mother thought I had a swallowing disorder. She started feeding me the "adult" Vienna sausages and finger foods that look like baby food. Basically, she would set it in front of me like it was baby food and let me eat myself, instead of making a big deal out of eating "grown up" food. I remember it myself to this thinking, "But, I LIKE eating my jar food..it tastes better!" I think babies get conditioned to eating the blander tastes/salt only and all the adult spices play a role in the hard transition. So, maybe keep in mind to stay with the bland tastes. Like: Canned chicken, cheese crackers, Vienna sausages, boiled carrots w/ just a little salt/butter. I read in a magazine that green peas were great to start them on- just microwave and make them mushy and let them explore!
Hope this helps!