1) Pitchers will take advice from anyone.
2) Actually, no he hasn't. Here are his line scores since:
Date IP H R ER BB K DEC
5/12 6 2/3 6 1 1 1 12 W
5/18 7 1/3 5 2 2 1 5 W
5/24 7 5 3 3 1 6 W
5/29 6 1/3 5 2 2 3 3 ND (Sox won game)
6/3 7 6 3 3 4 5 L
6/8 8 3 2 2 2 7 L
6/14 8 5 3 3 0 11 L
6/19 6 8 1 1 0 7 W
6/24 2 1/3 12 6 6 0 1 ND (Sox won game)
6/29 6 1/3 9 4 4 1 10 L
7/5 8 8 3 3 1 10 L
7/10 8 4 0 0 1 10 W
7/17 5 2/3 11 3 3 1 1 L
7/23 5 2/3 11 5 5 2 4 ND (Sox lost game)
7/28 8 7 0 0 1 6 ND (Sox lost game)
8/2 7 7 4 4 0 5 ND (Sox lost game)
8/7 5 6 6 3 5 3 L
17 games, I count 11 good starts (and certainly starts that you would take out of any pitcher and ones the team could have won had the offense shown up those days), 3-4 bad ones and 2-3 mediocre ones.
Since Pedroia's advice, ERA has dropped from 6.75 to 4.34 (still above where it needs to be, but a significant drop).
While he hasn't been Cy Young level, if that's sucking, 90% of the pitchers in both league suck.
EDIT - Apologies for the eye chart, haven't figured out the table thing yet. Works great in WORD.