Can you post a screenshot, or email a couple of hours of data (in .pp2 format) to support@pingplotter.com? Ideally, that would include a period where it was bad and also one where it wasn't bad.

1000 ms latencies inside the complex for your provider normally means either bandwidth saturation (sometimes your fault for downloading too much) or an issue with the connection (ISP has to come fix - bad cabling, etc). The patterns are usually quite a bit different between these two scenarios (but not always), so that's why it'd be good to see what you're seeing.

If it's an ISP problem (Comcast), then your best bet is to get their help to fix it (that's really your only choice, unless you replace Comcast with a competitor).

- Pete