McLaren do indeed look in a bit of trouble. I was watching Button's long run pace, sector by sector compared to everyone elses and most other cars were faster. Lewis seemed to go back out and try and go quicker on lower fuel but couldn't. Something strange must be going on though because in the space of 2 weeks McLaren aren't suddenly 6 tenths or more slower than the likes of Force India. I can only presume they didn't get the tyres operating correctly during FP2.
The other very strange thing is whereas the MP4-27 has a known trait of being good in high speed stuff and therefore would logically be very fast in sector 3. They were struggling in sector 3. Even their fast laps, their sector 3 times were down on the majority of other cars, including Force India, Sauber, Williams, etc.