I don't think that Richard Leadbetter is an "Xbot", but either way, I think LoT did a poor job with this analysis, cos it doesn't amount to a great deal more than the impressions posted by people in this thread. At least DF will (or should) post the native res, some analysis of the framerate etc. and now they cover audio as well. Whether you find DF biased or not, they offer up more info than LoT, although sometimes LoT have done a better job than they've done with RDR.
The longest a 360 install has taken for me is just under 11 minutes, and that's installing it to the hard drive. That's when the maximum of 6.8 GB of data is being copied over.