I thought the fact that the Rafale was getting an AESA radar in 2012, before the typhoon was a factor.My interpretation of "decisions made behind doors" suggests that we may not know if any took place for a while and only really be spoken about if the decision to pick the Rafale goes south (Which i'm not saying it will) and there is a rush to lay the blame of picking the aircraft on another person or saying they were pressured into it. Again i must emphasise that I have no idea if this has taken place or not.
AFAIK i read a figure somewhere that the cost of the Rafale was some 20% less than the Eurofighter (whether that included operational cost or not i cannot say)
This from the BBC
[1]
That implies the choice to pick the Rafale was mainly economic + slightly political so who knows, maybe there was a bit of "back room discussion".
My opinion, the Eurofighter is a better aircraft, however you can't blame them for picking the cheaper and still pretty capable aircraft from a country they're already pretty familiar with dealing with.
The Rafale will still benefit from developments like Meteor but not the AESA radar due to be fitted to the Typhoon in 2015 (AFAIK this is on shedule) [2]
[1] BBC News - India picks French jet over Eurofighter in $10bn deal
[2] Eurofighter and Euroradar to Develop Latest Generation AESA Radar | Aviation & Air Force News at DefenceTalk
Not to mention that commonality between the upgraded Mirage-2005 MK2 and the Rafale, was alos somehting which was desirable.
Also the Rafale proving its A 2 G capability in Libya also probably helped.