As for web, its very easy to spot this. As we all know, most if not all forums pretty much completely run all information off of the mysql tables, so it's going to be sending various requests to retrieve this information. Mine times out 50% of the time someone is trying to load another page. The server error log is filled with connection timed out errors, and if I didn't clear the log at least once every 2 days, it would probably be at 80+ pages right now.
When I say noticeable, it just means sometimes the page takes much much longer to load all information from the database, or sometimes it just gives up overall and doesn't even display the information. A strong example of that second one would be the shoutbox/chatbox. It doesn't seem to send multiple requests if they all time out, so it just stays blank unless you refresh the page and try again.
Here is an example of the server error log

It's never empty.
I don't know if this is something that is a default for NFO, or not. I say this because some various webhosts do not allow connections for extended times such as that, and close them if this happens, and will spit out a timed out error. I don't know if this is the case, but I'd prefer it not to be.
I've had the lite webhosting plan for about 4 months now, and I can say I'm not disappointed at all, its just this one minor thing that's slightly annoying me.