Yesterday I went through security at BWI, Terminal B. I was somewhat aware that that the TSA would have their personnel in place but I wasn't quite ready for the actual experience. Three major impressions come to mind.
1. This is aggressive in your face security, not the passive third world experience we have become acustomed to.
2. The workforce in TSA is predominately white male, law enforcement backgrgound. I foresee problems arising when persons from other backgrounds/cultures encounter this new security apparatus.
3. The aggressive nature of the experience makes it quicker and yet more time consuming at the same time. Expect to be wanded more often and to have your carry-ons be the subject of greater scrutiny.

In general, I was impressed, I think TSA will definitely make the non-business flying public feel more secure. I do feel that some pax will have trouble adjusting to the para-military atmosphere that will accompany airport security for the foreseeable future.