> At the last minute, I decided to put together a portfolio of my work
> to take to a couple of interviews I have lined up this week. I haven't
> had time to ask if it's OK to use these blurbs, generally conveyed to
> me via email.
>
Assuming you also have a couple of phone numbers or emails you can
provide so that they can also call/write to get references, use them.
I don't mean that the people you quote in the blurbs also have to be callable. I just mean that advertising alone isn't enough.
But, yeah, I would use them.
Joanna