I would be really interested to know how many of those runs came when the team needed them the most. Making hay while the sun shines is all well and good but I doubt there would be any "tough" knocks in there (at least I don't seem to remember). Using averages as a starting point is fine but how/when the runs were scored should be factored in too.
FWIW, his innings today is a good example of what I'm interested in.
Coming to the Test, I feel England did well to snatch 6 wickets. One can assume we are as good as 8 down since our last 4 wickets tend to not score much, so the number o runs we add will all depend on how many Pant can score with the tail. He is the key to India's chances in this Test. Had it not been for Rohit and Rahane, we would very well have been all out for 200 odd.
Even day as far as I'm concerned. If India can get to 350+, I'll take that as a job well done and hope that England collapse around Root, who I'm sure will torture us again.