When will Latos take a break, and for how long?

I had an actual live caller and an actual participant in the chat room guest during last night's Podcast, which was all kinds of awesome.  Nothing like having more than one person to talk to to make a discussion flow better.  While we touched on a variety of topics (feel free to follow the above link to hear it all), the one I want to follow up on this morning is Mat Latos and his 'rest'.

To recap:  Padres GM Jed Hoyer is on record saying the team wants to cap Latos' innings pitched at 150 for 2010.

Interestingly, there is precedent for giving a young pitcher a break in the middle of the season.  Detroit promoted 20 year old phenom Rick Porcello to the majors last year.  They had the same concerns the Padres currently do about overworking this prized prospect too early in his career, so they did two things.  One, they limited his pitch count to less than 100 (which they stuck to until his 24th start on 28 August), and two, in an attempt to limit his innings they shut him down following his 5 July start for 15 days.  Because this break coincided with the All-Star break, Porcello ended up only missing one start.

Porcello's numbers pre and post break are interesting: