Feed Fetching Rate

How often do feeds update? RSS or Twitter or Reddit? I have background updates enabled on my iPhone and iPad and it seems like the feeds show up in NewBlur 1-2 hours (sometimes more) after appearing on RSS and Twitter. I have a premium subscription. Thank you.

You can see exactly how often each feed is fetched by right-clicking on the feed title and opening Statistics. Twitter is limited to once an hour due to their API restrictions, but the Statistics dialog will show you the exact fetch rate. Scroll to the bottom to see the actual fetch times, not just the expected times. They should match and basically always do.