Hi,
There are some issues with wccp slowness on routers. It depends on what version of IOS you are running. I see you are able to configure ip wccp redirect in so you must be running code in the 12.2 train or late 12.1T.
Configuring ip wccp redirect in works well and should be the same as redirect out .
The check that the CE is working proberly do a sh ip wccp and make sure you are getting redirected packets.
On the CE do a clear stat all
Then check the following commands to see if you are seeing requests on the cache
sh stat http per
sh stat http sav
Alot depends on the version of code you are running and the interface types/ If you can provide those that would be great.
Cheers
Phil Lynch
Cisco Systems