Ah, I see. Searching your posts uses the forum search engine rather than Google, and there is a feature there that forces a delay when too many searches are being performed at once or in quick succession, so I think that must be what you're seeing. I can't replicate the message myself at the moment, but it's likely you were getting it when the forum was busier than it is just now, or maybe when the daily backups were being run and the server was under a greater load.
Classical Guitar Forum.
"Experience is something you don't get until just after you need it." - Steven Wright