I think parents are way too cautious (more often first time parents). I meet so many moms (friends, family, strangers) that continue to give their kids purees for far too long. I worked with a woman who's 2+ yr old was mostly eating purees and she claimed it was because her kid was "sensitive to textures." I just smile and nod.
I still remember my 6 mos old eating graham crackers in the grocery store and some woman came up to me and asked how she was eating it. She said her 11 mos old "has trouble" with baby mum mums. I watched her as she started panicking because "a piece" got in his mouth. I wanted to say "it's suppose to go in his mouth so he can eat it! I find it is more about the parent's comfort level and what they introduce. Babies can eat most things as long as it's introduced to them and they get to practice eating it.