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.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD (XL, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!