Why does my heart go "ooooo" and my head go "winter testing means diddly squat"... its a rollercoaster of internal emotion.
Winter testing is VERY important and is a good indicator of how the majority of the season will progress.
In the last 10-15yrs (as far as I can remember), when a team does well in Winter testing, it also does well during the season. Similarly, if a team does badly during Winter testing, they also do badly during the season proper.
From what we've seen so far, McLaren should be seriously worried at their lack of pace. On the final test day, Hamilton was 1.2s slower than the fastest car. This is very serious as you can bet that Hamilton was pushing like mad to go as fast as possible. What is really worrying is that as yet, they havent ran a full 2009 spec car - logically, this doesnt make any sense to me. I'm not a big believer in "top secret car parts", but this seems to be the only reason, as it will hurt McLaren by not running any tests with a complete 2009 car, before Australia.
BMW so far, are the team who have done the most amount of test miles and this bodes well for them - usually the teams who do the most testing have the fastest cars - and dont count out the Ferraris, who have been testing away from the other cars and whose drivers are renowned for not pushing their cars to the limit in practise and test sessions.
Next week, will be the final test (at Barcelona) before the season starts and all the big boys will attend. It should be fun.