I believe the Lotus is consistent enough to perhaps even fight Red Bull for the WCC. The Lotus is unlike any car on the field in that it consistently operates well within how these tires want to work. Sauber is the only car which comes close to working so well with the tires. Meanwhile, MP4-27, W03 are the most fickle cars on the field. I believe the Mclaren is the finest car out there, but everything has to be 'right' for it to work. Stupid tires.......
It's about 60 points difference, so it should be doable. I'm not quite sure what Red Bull is doing atm. I'm not underestimating Adrian Newey though. It would be awesome if it happens, 4 big players in F1 for 2013, with Mercedes maybe bringing the W04 as well.
I believe Lotus could have won quite a few races already had they just qualified better. The car has amazing race pace