@stephenw10:
Unless your Linksys router was particularly old or underpowered I would not expect any increase in speed.
This. With the potential exception of an old Linksys and a fast connection, and the definite exception of scenarios where you're opening large numbers of simultaneous connections, like a bittorrent client set to open as much as it possibly can.
Comcast is cable so should have a 1500 MTU end to end, no need for MSS clamping. That'd most always exhibit itself differently than slow page loads too, more likely to be some pages completely failing to load.
That box is capable of pushing over 1 Gbps, it's not a question of hardware on the firewall at least. That box is significantly faster than any Linksys, but your Internet connection isn't fast enough that it matters. The latency through that box will be a good deal lower than the Linksys, but we're talking tiny fractions of a ms, not enough of a difference to be perceptible. Hardware or problems at the client are more likely the cause, there's vastly more involved client-side in rendering today's websites than there is for the firewall pushing packets.
Try to narrow it down with further measurement - different client systems, different web browsers, etc. May just be a fact of life on your Internet connection. Business class connections are generally better quality and better connected, you may not be able to achieve the same level of service on a residential connection. There's a reason business connections cost as much as 5-10+ times as much.
