....but speed mentoring is not mentoring any more than speed dating is real dating.
The exercise has its time & place:
* quickly meet a lot of folks for later follow up
* receive multiple answers to a specific question (or set of)
* stretch your comfort level with approaching strangers
* encourage being prepared for conversation you'd really like to begin
However, you wouldn't put speed mentoring as an achievement on your resume. It can't take the place of the one/one conversations and long-term planning that a mentoring relationship supports.
Try all tools. Enjoy all experiments.
(I don't recommend teaching your kids to date via speed dating)
The two activities are alike but not as a replacement for the real thing.