You should see it locally almost immediately on your own newsserver. It
takes time to "propogate" to other servers. I find that many major
services only take a minute or two to propogate nationwide, even
worldwide, but some people have ISP's that do not have good newsservers
for some reason and messages can take 1-7 hours to appear.
That's my experience also. I would see my own messages immediately with
every ISP I've ever used. Some would propogate fast nationwide, while
one that I had several years ago *never* made it past the local server.
As soon as another service became available, I jumped ship fast!