I am curious how you got to ECI. Was it recommended by his physician, did you look into it yourself?
My little one has low muscle tone in his trunk (13 months old). This resulted in him maintaining a military crawl, dragging his belly across the ground and not getting up on hands and knees, not being able to sit up on his own, and delayed speech. At his 1 year check up, his ped talked with me about having him evaluated to see if there were exercises I could do with him to catch him up. She said she wasn't worried at that point, but it might be helpful.
He has had a few physical therapy sessions (4 total so far) and yhe PT gave me some exercises to do with him at home. I have seen tremendous improvement! He is also starting to speak more and finally said "mama" this past weekend (sweetest sound I ever heard!). He has been saying dada for a while, but no m sounds.
The low muscle tone in his trunk is apparently associated with some delay in speech(which surprised me at first, but made sense once they explained breath control, etc.). He will be meeting with a speech therapist starting next week.
I was not and still am not too worried, but I wanted to nip any problems in the bud so I wouldn't have need to worry and my son wouldn't need to struggle down the line.
My suggestion to you is to get specific information from the therapist (what shoes, where to get them, what exercises you can do with him at home) and to look into some sessions with a professional--through ECI or not. My pediatrician gave me some great places to try in the Houston-area and I am happy to share if you need/would like.
Good luck, and don't go searching around randomly on the internet--it is a truly scary place! If you are given a diagnosis, then by all means search out the info from reputable sites. Let your therapist be your guide on this.