OP = here is a string that discusses sensory food aversion -
http://www.dcurbanmom.com/jforum/posts/list/98518.page#800237
It is great that you are aware and working the issues with such a young child. Older children can overcome the oral motor issue, but then stay stuck on a limited range of foods for sensory/behavioral issues that are hard to unlock. (that is where we are unfortunately). Essentially, you can overcome lots of things before 4, that after 4 it can take more of a cognitive behavioral approach couple with OT with sensory work.
Best advice - continue to utilize the infant and toddler, but also get a consult at the children's hospital feeding disorder clinic and/or kennedy kreiger. The expertise they bring may give you critical insights. The earlier you intervene with feeding issues, the better.
Books to read are "Just Take a Bite: Easy, Effective Answers to Food Aversions and Eating Challenges!" Lori Ernsperger (Author), Tania Stegen-Hanson (Author), Temple Grandin (Foreword)
"Feeding disorders in infants and toddlers: diagnosis and treatment." Irene Chatoor