Ditto to what Rhyang said...
I probably would not consider myself a quad but by loose definition I am still considered a "walking quad". I am 100% independent and have been for some time. I golf, work out, etc. I do have a C5/6 injury (Brown Sequard Syndrome) and still have impairments on all 4 limbs.
At this point, no one would know I had been hurt unless I told them. However, I am NOT fully recovered. Just because you don't see the effects does not mean they are not there. I still experience some of the joys of this spinal cord injury.
I have been luckier than most for sure...