I have my own theory (http://www.livejournal.com/users/kalypso_v/33157.html) about the Dalek in "Dalek". But leaving that aside, I think it's pretty clear it's an old-style Dalek straight from the Time War.

I've only noticed during the current re-runs that Rose complains about the Tardis's telepathic interference inside her head in "The End of the World".