I have a new agent (1 1/2 years in business), and I'm very happy to jump on board with him. He's totally aggressive, has attended several conferences, expositions, and workshops--knows all of the senior editors at all the big houses (by face and name), and abides by the canon of ethics put for by the AAR. He's fast and exacting when reading my material. He lists all of his sales which are only seven or eight non-fiction sales to date, but they are to large and medium presses that pay advances.
He's been honest in his trials to sell fiction and has had some trouble there. It's not for lack of putting the material on editor's desks. His stuff is everywhere, because all of his clients receive up-to-date reports on just where our books are, and by whom they're being read. He has a substantial background in literature and editing and the publishing field.
New agents have it just as tough in the industry as new writers. They have to break in just like we do.
I was with Richard Curtis 15-years ago, and their roster reads like a whose who. I was a tiny tadpole in the mix--no one, and I mean no one (seldom) answered my letters or returned my calls. Two of my books just faded away in memory, and I'm not even sure where they went to, or to whom. No contract.
I think I'm in better hands with a newer agent, although it will take him some time to hit his stride. I'm willing to wait, certainly after the performance he's put in so far. It's a trust issue.
So I would say, small agency=hungry like the wolf. They HAVE to climb, because it's an up or out postion. And here's the crux: There IS such a thing as an agent slush pile. This is because the larger agencies that have been in business (since the last ice age set in) have proven records and name-recognition. Oh, yeah. I've talked to two agents who have conveyed this to me, and I found it to be a bit shocking. Is there some favoritism--yes, there is, but it is SO underground that it's rarely brought to the surface. It's not rampant, but it is there, and those are the cold hard facts.
Above all, nevertheless, it is a winning book--great story-telling that will determine the final outcome. But I often wonder just how deep this hierarchy thing goes with agents and edtitors. In my case, time will tell.
If you choose a smaller/newer agency, be prepared to hold on for a wild, maybe long ride. But know too, that you just might be one of the nut crackers who bust some doors down for your agent.
Whatever you decide...good luck and good hunting.
Tri