I have the same problem, I think it's my wifi connection now. But what you could try is press the home button twice and hover on an app until it jiggles. Then click the horizontal line at the top left of every app ur not using.
Your iPad should run at least a little faster, but Internet things is most likely due to your wifi connection IMO.
I'm still looking for a solution too, bit hope this helps you.
Sent from my iPad using iPF