Iman Shumpert went down in April 2012, had surgery, came back in January 2013.
Kendrick Perkins went down in June 2010, had surgery, came back in late January 2011.
David West went down in March 2011, had surgery, came back at the start of the lockout season 2012.
Most ACL tear surgeries should take about 6-9 months of rehab. Rose just doesn't feel confident about himself so he's a scratch (apparently some people are calling him a wimp). If Rose does NOT want to return this year just say he doesn't want to return. People don't like to be kept waiting.
Rondo "tore" his ACL in late January, gets surgery in February and is in the process of rehab or recovery. From March to November, that's about 9 months. Shouldn't take over a year.
I'm confident that Rajon Rondo will be back by November (if not, December). It really doesn't take Rondo to be out for the rest (most) of next season as well.