Press - The term refers to the pass coverage technique when the defensive back is aligned as tight to the wide receiver as possible. The technique can be used in tight man-to-man coverage (bump-and-run) or also in zone coverage where the corner's responsibility is the short flat.
that taken from
http://sports.espn.go.com/espn/print...000&type=story
Looks like Texans used the second definition, zone coverage in short flat, it sure wasn't bump and run coverage
Now, this year Texans actually have a lot of people in same position as last year, but most of time Petey was here there was a lot of annual turnover in positions. And sure Petey went from being a favorite his first couple years to being perhaps seen as part of defense problem in years after that, so change of scenery is good for him.
The more stability and team comaraderie you have the better in general, likely Titans have that stability and winning history for now