A high profile NYT best selling author has offered a commitment to blurb the future galleys of the ms I'm currently shopping... (and there WILL be galleys, dammit!). Good or bad idea to include this info/author's name in the housekeeping section of a query?
It won't hurt you, so why not. If you were sending that information to me, I'd want to know why HPNYTBSA has read your manuscript. Thus you may want to include that information as well.
You would say "HPNYTBSA Felix Buttonweezer has offered to blurb my novel. He read it while incarcerated at Carkoon and it soon became his favorite escapist pleasure."
The reason I'm not jumping up and down and screaming YahooooKalamazoooo about this blurb offer is that sometimes the audience for one author does not translate to the audience of another. My fins would falter if Lee Child offered to blurb a novel by Tawna Fenske for example. Tawna Fenske is a terrific writer, and I love her books but they are quite unlike the Reacher novels. You haven't mentioned if you think your audience will be the same as HPNYTBSA's.
At this stage though, there's no harm in including the information.