It would definitely bother me and DW if ours were at different schools, as the school run would be a nightmare. And it would mean someone was going to school among people they didn't know from the local community or the local primary.
The underlying issue here, surely, is that this is an admission by the government that not all comprehsnsive schools are equal. If they were, there would be no need for enforced social engineering of this kind.
And yes, one small, malicious part of me rather likes the idea of certain people in posh parts of my city thinking they were home and dry for one lovely catchment and finding they're in the less desirable one. So sue me. It actually happened in this city, on a small scale, about 10 years ago - anyone in Sheffield will be able to tell you about the great High Storrs/ Abbeydale Grange catchment debacle.
But deep down, I don't like the idea of forcing parents to send their children to schools where they dont want to go. It's just that, even deeper down, we ought to feel it doesn't matter - right?