I had a mom friend tell me to just pay attention to what my son seemed to need re: solids, and not worry about what others thought. My son ate less than 2 jars (I assume you mean the medium-sized ones?) per day at 11mo, and had only just been consistently having 2 very small solids meals a day since about 10mo. Soon thereafter, though, I had a feeling he wanted to have a solids lunch, too, so I started giving it to him most days. Around the same time, he started nursing every 2 hours during the day (although he would usually go a 6hr stretch at night) for 2-3wks. He learned to walk and got a few new teeth just after that stretch ended, so it was clearly what he needed. He continued to not eat a lot of solids, although he was usually having 3 meals a day, until he was 14mo when he started eating more, and then had another bump-up in solids intake around 16-17mo. It also took him until 17-18mo until he had enough teeth and the desire to eat more foods that required more chewing (chunks of chicken, etc.). Now he's almost 2, still nursing, but most days eating TONS of solid foods.
So, I would just keep paying attention to what you feel your child needs (forget others trying to press solids on your child!), and you'll gradually get a sense when he's ready for more. Just keep offering appropriate foods (depending on ability to swallow, number of teeth, interest he's shown in similar foods, etc.), and he'll gradually try some as he's ready. My son's first food was avocado, and he almost single-handedly finished a serving bowl of avocado yesterday at a BBQ. :) So it will almost certainly happen eventually that he'll eat a lot more solids!