Not all technology is created equally. There is always going to be a company that does not put the time and care into their product. At the same time, this could also be an issue with user calibration. From this article about biometrics, it says that "The most negative factor with this type of technology, as the user ages it will change over time" (here's the link:
http://united-locksmith.net/blog/wha...ics-technology). So what seems to happen is the tech is too good. If you are sick or getting old, then it starts to become more of a problem for the actual people that are supposed to have access. I always tell people that if your security is not practical for the people that are supposed to use it, then those people are going to break it.
It is the same thing with apartment gates. There are always people breaking them, and working around the security because they make the mistake of losing a key. When people need to work around their own security, bad stuff can happen. If you add a company that is losing precious man hours every time a person with a blister can't get in the office, then they are going to recalibrate their devices so fast everyone heads are going to be spinning. Most of the devices have the ability to be sensitive enough to keep out someone with a cold.
It just seems like biometrics don't work well for offices. Something like the German Minister's Office needs to work quickly and efficiently. Can you imagine if he is having a meeting and could not get into his office because he had a bit of a sore throat or a cut on his finger?
Just post a guard outside of the door, and have some cameras to watch that guard. Run that office like a night club.