d-i when installing from a USB or DVD should be smarter about internet connection

We are installing a server for a test (debugging an issue) using 14.04 via bootable USB.

The server sits on a LAN but has no internet connection. It DOES have access to a local NTP server.

While trying to painfully install this via USB, we wasted at least 10 minutes staring at the screen watching d-i churn trying to talk to archive.ubuntu.com to get package data.

Network connection != Internet Connection. The installer should be checking FIRST and then either hitting the internet or not hitting the internet as appropriate.

E.g. it shoud do something quick and simple like a ping, wget or something to verify it can reach archive.ubuntu.com. If yes, then proceeed to pull data from internet for install. If no, then continue ONLY using the USB/DVD as the package source.

It's infuriating when I am trying to help a customer debug a problem and we waste precious time waiting on this insistance on having an internet connection.