I had seen your earlier comments and asked Googlers how hard they thought it was to change projects. They said they hadn't ever encountered another company that made it easier to change project than Google does, and wanted to know if you had encountered such a company.
I've already shared my existing compensation, and I'm not drastically underpaid. If their offer is not 15% better than what I'm making now, it will make me think they aren't that interested in hiring me.