I have heard for some that 1st is better to skip because that is when they learn to read (ugh). It's hard to say. I know that in K DS would go nuts if they were reviewing letters and sounds. He still will not like it if they are teaching how to read but hopefully they can just give him a book and some reading assignments or something and that would be a little more up his alley.
It's the same for DD. Hopefully she'll get an extra subject acceleration in reading.
I took the bird (skip?)-in-the-hand approach: take the skip now because who knows what might happen later?
Val