A little secret from a veteran speaker...
The most important part of any speech is the one most speech-givers leave in the hand of others:
Their introduction.
For years, out of ignorance or politeness or both, I allowed my hosts to do the honors, and most times--while always well-intentioned--the result was a rambling re-cap of my official biography, with emphasis on the most benign parts, spiced with a combination of mispronounciations, editorial comments (usually over-the-top flowery) and attempts at humor (usually at my expense).
Once, to add insult to injury, I was introduced to present my "How To Do The Impossible" speech, when I was booked--and prepared for--a completely different one...which sparked quite the memorable on-stage panic repartee between the host and yours truly. (Yeah, yeah, I know...while this blog is the global proponent and cheerleader for Surprise, this is one I could've lived without.)
So no matter where you may have to speak, to avoid any confusion (and more importantly to set up exactly what you'll be talking about), take the matter into your hands, write your own intro...and smile when you insist it be read verbatim.
You'll breathe easier, and your host will probably breathe a sigh of relief as well.