An excellent article!!!!
We've been doing some interviewing for SQL developers and about 1/2 the time I walk out of there saying hmmm..... well I guess we'll have jobs forever 'cause these people just don't get it.
Spouting facts is one thing but being able to actually walk the walk is more important - so the kinds of questions to ask are not what property does what, moreso situational like how would you fix the performance on an sp that does....
Mark