Call me crazy but I think they are just trying to answer the questions so many of the senior F/O's ask: when am I going to upgrade?

It's a rough estimate, but at least its something. I think its better than being left completely in the dark.

Disclaimer: I'm not one of the possible ungraders, as I have been around for 3 months.

Disclaimer 2: X-treme, not trying to take you on about this, just tossing my read of it in there.