There is so much wrong here, it's hard to know where to even start... oh wait, you nicely numbered it. Sweet.
1) Bullshit, blood tests are accurate while breath tests are all across the board in terms of accuracy. If you think you are under the limit, always go with the blood test because the breathalyser is more likely to screw you.
2) Urban myth. Everyone and their mother has a breathalyser cheat method.
3) If the cop thinks you are purposely delaying, you're screwed. Furthermore, admitting *anything* to a police officer is always a retarded idea. Save it for the judge, nothing you can say to a police officer can improve your situation.
4) Women get more intoxicated for the same volume of alcohol. BAC tests don't have a sex bias, drinking does.