Hi thebigpa & AshWilson,
We understand that you are having issues with your iPad when you connect to the Slingbox. It's necessary to determine if the issue is being caused by the network (home/remotely), the Slingbox itself or the iPad application.
I recommend you to test the connection first away from home using a different computer and verify that you do not have network limitations and the stream rate is normal. What's the upload/download speed at the Slingbox location? You can use this link to get that at home: http://www.speedtest.net
Have you tested the connection using your iPad in different networks like 3G or WiFi? Do you have the same trouble in any network that you try? If that's the issue, I suggest to run the Setup at slingbox.com and run manually the Internet Viewing setup, that might help if the Slingbox has the SNATT option on instead TCP.
Let us know how it works