Nothing is faster than a wired connection.
The slowdown is not your connection, but its the Tivo itself.
In comparison, fastest network connections to slowest, wired, MoCa, Wireless N, G, B.
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Roamio! Oh, wait, Its Juliet!
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!