I just can't really believe that. It would be an unheard of lack of understanding how the QB's drop and footwork links to the timing of the routes.
The ONLY reason to believe there may be something to it would be, you know, the noticeable poor timing between Williams's drops and the timing of the routes.
Kurt Warner was on some radio show or other this week and was asked if his noticing that Williams playing looser this week may be related to how it seemed like he had less to do on LOS as well. He went into depth how he, after two MVP awards, left the Rams, went to the Giants, and was asked to do something as simple as pointing out the Mike, and how it slowed his post-snap processing down because he didn't feel he had time to look at the secondary before the snap. He said that both that, and how Williams said they got the play call way faster from Brown, could explain how it looked like he was playing with much more rhythm this week. Because his focus wasn't on calling protections and changing playcalls to something he liked until a second before the play clock expired.
If it looks the same offensively against the Vikings and Lions, I'll start to buy into these ideas a bit more. In which case I'll probably lament that they got the OC they did to tank the first half of the season.