Yes, I know what you mean, at least a human did something, even if it was just to reject you.
I think the dynamics have changed. There are 2,400,000 unemployed, many on JSA and to qualify for JSA they must apply to 2 jobs a week - does not matter so much what jobs - just that they apply. As a result recruitment agencies are swamped for every vacancy, including many CVs that are not suitable, perhaps from people who are just trying to make up their 2 applications that week. No surprise then if agencies are not bothering to acknowledge applications any more.