Not necessarily. They are just one of many factors that help paint the big picture. We look at every facet of a guy's career and factor in everything. e.g. Checkrides, airframe type, experiences, a check of the bro network, etc. Although earning a Q-3 or two and getting downgrades on every checkride for poor judgment and lack of SA while also scoring 85 on every open-book test won't help your chances. (Seen that interview package before, STS.) BL, there's really no one silver bullet that kills your chances.
Now, to get back to the thread at hand: The Q-2 is a great technique...if you're a DB SEFE with no fucking people skills and a complete inability to make a decision.
EDIT: And by "fucking people skills" I didn't mean fucking people skills.