We've fixed an issue which was causing some feeds to update later than the update frequency set.
If you still experience slow updates with any of your feeds, please let us know.
To see how often Feed Control checks your feed, and the last time it checked it, click on the feed from your list of feeds. On the first tab (Source) you'll find two rows:

Checked every X hours/minutes
is the update frequency you have set. Feed URL last fetched X hours/minutes ago
is the last time Feed Control checked your feed for new items. This should always show a time in line with your update frequency (unless you've just changed the update frequency, in which case it migh take a few minutes to update).