OK, I said yes to Jan Dennis's offer of representation today. It took me a while, partly because of this thread. It is true that he is not known as the promptest of communicators and we had quite a discussion about this (on the phone). He acknowledges that it's not his strong suit and he's willing to work on it. When I feel a little more secure in the relationship, I'll try to encourage him to at least send a "no thanks" for requested materials. Judging from my personal experience, if he is interested, he'll get back to you quickly.
To clear up a few things, he was not the agent for either Frank Peretti or Stephen Lawhead, but the editor/publisher. He gave them their first break. He also repped Ted Dekker's first twelve books, but is no longer his agent. I didn't ask why.
His first love is Christian speculative fiction, but he has repped authors in other genres, both Christian and general.
Hope this helps a bit.