As an FIC instructor I encourage my students to use ALL presentation techniques as they should be competent in presenting, regardless of subject or media or the size of the audience.
I find the problem with whiteboards these days is students get
a) bored waiting for the instructor to finish the di Vinci masterpiece or
b) can't understand the 'toddler tracing' an instructor 'throws' on the whiteboard over the three previous scribbles that masquerade as diagrams
c) read ahead too far when the instructor has prepared well and don't hear what is being said at the relevant point.
Mine now tend to be PP led (prompts and diagrams) but with plenty of interaction through whiteboard/training aid discussion.
Alot depends also on what facilities are available at the school you teach on.
DD