Last night Favre was 15/27 for 171 yards, 1 TD, 1 INT (71.68 rating). He started the second half 0 for 7, if I'm not mistaken.
Last year in Week 1 he was 14/21 for 110 yards and 1 TD (95.34 rating).
Last year in Week 2 he was 23/27 for 155 yards and 2 TD (115.28 rating).
In terms of raw passing yardage, Favre is well ahead of the development curve with respect to last year. In terms of passer rating, though, he's lagging severely behind. 😉