Sure dpat. But that's one (anonymous) man's opinion. I counter with Site link removed per request of other site's Webmaster It's not all good news, but it does say that agents will and want to take on new clients. And have and will take on clients with no experience. But the key, which I'll get to, is to get at their secretaries, assistants and junior agents.
Also, you have nothing to lose querying an agent. It's an envelope and a stamp. It's a lot cheaper than making the movie yourself. Or dealing with small prod cos that may or may not be legit or may be legit but still not pay you.
Lots of working writers get agents first (and therefore get work fast). Sure, a lot of them win contests (that Iris lady who wrote Sands of Iwo Jima won a small contest - Palm Springs or something, and got an agent and got her script made and nominated for an Oscar in a very very short period of time), but some simply submit.
Agents will expect you to have more than one script by the way. This is pretty important. You can make and lose a contact pretty fast if you are a one hit wonder.
I used to know a ton of agent assistants and junior agents. One agent's assistant at ICM talked to me one the phone for two hours one day after I graduated school and gave me an unending amount of great info (he is now the head of an entire division at ICM). Unfortunately, when I knew these people I didn't have anything to show. Now that I might have something to show, they're all senior agents that won't take my phone calls. But junior agents and assistants are looking for new product. They absolutely are. They're looking really really hard.
Always query a specific agent, not a general agency. If you can, address it to their secretary or assistant. You can easily call their secretary/assistant and say I have a query I'd like to send it, can I address it to you? They like that. And they'll very possibly read it.
Another good way to find these people is to read the trades. 'So and so was recently promoted from junior to senior...' or 'so-and-so, good agent's assistant at ICM...' Or if you go to any of these seminars or anything, ask the writer not who their agents is, but who their agent's assistant is.
If the assistant/secretary/junior agent likes it, it's the same thing as a referral.
I think going through an agency is actually easier than prod co hell. As the guy in your link referred to, going through small prod cos takes years and years. You struggle and struggle to get a 100k film make, then a $1 mil film made. 10 years later, and probably with a lot of bad experiences in between, you finally graduate to working on studio pictures. Prod cos are always making promises they don't keep, going under, are swindlers or subject to swindlers themselves. I just think people shouldn't rule the agency route out is all...