While I do like the looks of the boost-select trick, I don't think this is what the programmers were trying to achieve.
You boost in the previous lap, cancel the lap with select, and then re-use the boost by boosting the turbo again in the next lap. Obviously the boost itself isn't canceled and you can recycle it in the lap though you just cancled it!
That tells me this was not what it was meant to be used for and is thus not a feature but actually a bug, which you guys of course exploit to this insane extent
Don't get me wrong I appreciate the effort but I do think it should be reworked and changed into something more plausible...
edit: I also think this trick needs it's own thread somewhere, I don't see any, because I think only a few elite pilots know about it and that just seems wrong to me..