I updated my AVG 7.5 to AVG 8 on the 30th April.
I have not found any problems with the speed.
I like the new AVG Centre Layout.Everything simplified and easy to use.
I have AVG Anti-Spyware 7.5 ,but the only decision to make is whether to keep it running or uninstall it and just use AVG 8 which incorporates its own Anti-Spyware component.
ILS32