I'm using high speed cable internet, my speeds usually run between 15m to over 20m (ZA free).
With Outpost 2009 free edition I was getting from 2m to 5.4m,
averaging 4.5m.
The strange thing is there was no improvement by turning off Outpost 2009 free edition.
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I got the same results with Outpost turned off. Turning off WebShield made little difference.
With ZA Free off, I get an improvement in speed.
Outpost 2009 free edition must be filtering even when off