Interesting that IAG have come back so quickly with a second offer which is admittedly not a big move on the original offer.
I'd imagine they'll let the dust settle this week and review the situation. EI confirmed the previous guidance for 2014 numbers last week and with the full results due 24 Feb, they may take a wait and see approach.
IAG will also be busy with their year end numbers due to be released Feb 27.