To be honest the standard R wasn't far off the pace of either of them. Would be interesting to see the rolling starts done with a TCR also
I had a fairly extensive 'play' with a 7.5R the other day on A-roads and dual-carriageways, in the dry. Either he was a bad driver and/or the GTI punches the weight advantage massively over the R, whichever way there was very little in it. It was only off the mark from roundabouts where he had any advantage. In-gear he couldn't shake me and up hill (on sweeping dual carriageways 60/70mph) I'd even go as far to say that I could gain. I think it would have been a different story if it had been wet though.
When we got the bit where he went his way and I went mine he was rubber necking round and gave a huge thumbs up.