I'm sorry I'm so late in responding to this! I'm also hoping that by me responding, it will bring your discussion back to the top where others might see it.
I did a quick search on the March of Dimes
site on Down Syndrome and it mentions facial features being effected - but nothing specifically about the test results, etc. I would think you would know by now if the results were positive??? I would definitely ask the ped or the neo about this to get some answers.
Take care - sorry I don't have much experience with this!