Sat Nam! (Literally "Truth Name"--a Sikh greeting)
It's not uncommon, but not the majority either.
As to whether it's good or bad, that depends (like a lot of things) on the agent in question. Personable agent with lots of contacts in the business and a desire to help her/his fellow writers and a knowledge of the craft, yeah, that'd be a good one. Agent who wishes she/he had more time to write and begrudges every minute spent working on her/his clients' behalf, no, I wouldn't want that one.
Blessings,
Siri Kirpal