Its pretty clear this front wing is not in the spirit of the rules and allowing them opens up a can of worms for other teams to interpret rules in static and racing conditions.
As long as it allows the team which is using the flexi-wings to win races, I don't see why the "spirit of the rules" should be of any importance.
With so much money riding on the race result of a formula one team, absolute performance comes first. Gentleman's agreements come second. RedBull understand this.
It perplexes me as to why McLaren didnt use the KERS (in 2010) device given that it was clearly giving them an advantage. I know they had a gentleman's agreement regarding its (non) use, but I feel that McLaren really let other teams off lightly. Had they continued to develop it, McLaren could've ben further ahead in the championship than they are now.
In any case, the FIA isnt doing anything about RedBull's wings, the other teams are not protesting, so I don't see why F1 fans should worry. If other teams really do find RedBull's flexi wings and their use so offensive, they can lodge an official protest with the FIA.
All being well, RedBull should pick up a 1 and 2 tomorrow, followed by Alonso on the podium. Of course, as we know, Vettel and Webber are not the best drivers by any means and do have a history of cocking things up. So, Alonso & Co still have a small chance of making it into the top 2 positions.
Unless there is rain, tomorrow's race should be once heck of a borefest.