I have Silver service and I measure using Googles Speed Test a speed of 25 Mbps and better. When I turn on the VPN the speed drops to 2 Mbps per Googles Speed test using the VPN server with the least latency which is 700ms. Whats your experience?
I use Private Internet Access and still get pretty good download speeds in the 8-12Mbps range. Browsing websites is a different ballgame though as I can definitely see a slowdown in how the sites load.
My experience was that the same speed tests over VPN usually were 85%-90% of that without due to the added overhead. It largely depended on which VPN solution I was using. Some VPN servers were slow to begin with - most I used were private anyway due to what I was connecting with. As noted it does bypass Viasat's web acceleration which resulted in overall slower page loads - but I really only noticed that on non-secured sites. Didn't really see much of a difference with secured sites through VPN.