In a normal scenario, it takes at least a month or two from the manufacturing date to delivery of car to customer. It will be hard to expect a Jan 2012 car in Jan 2012. So for those who plan to get a car before CNY 2012 (end of Jan), you will most probably get a 2011 car. The safest would be to book in Feb/Mar 2012 if you want to make sure that you get a same year car. Unless you feel really lucky and wouldn't mind trying what boboi did. Not everyone can be so lucky

So if you get your 2011 car in Jan 2012, next time upon selling you will list the car as 2011/2012 which most ppl will understand what it means, and it will fetch a slightly better price than say, a March-registered 2011 car.
Year of make is important only if you plan to sell your car at the "threshold points" of automotive loans, i.e., 5, 7 or 10 yrs (just an example). Cars 5 yrs and below will be able to secure a higher loan, lower interest and longer repayment so these will have a better value than a 6yr old car.
So let's say you buy a Dec 2011 car now. If you plan to sell your car in 5 years, you need to start advertising in Oct 2015 to play it safe. If you pass Dec 2015 then your car will drop to the next rung. Remember, at the end of the day how much you can sell your car will depend on how much loan the banks are willing to offer to your potential buyer. Don't think about those rich ppl who can buy outright or who can put half the amount as downpayment. If you're lucky and you find such a buyer then good for you. If not, you must consider the bottomline as in a new buyer just starting out, instead of buying a brand new Myvi/Persona he can also consider your 5-year old Forte. This is a common sense method employed by used car dealers when asked to do an appraisal of your car.
Normally, year end cars will get more discounts or lower interest rates compared to a next year car. A lot of these interest rates are actually partly subsidised by the manufacturer themselves, in order for them to push off the remaining stocks of last year's cars. So if you got a great year end deal, you can't really complain of future selling price, right?
Also, most ppl when they sell their car they forget to deduct the insurance and other misc costs from the original selling price when calculating their "losses". For example, if you buy a car at RM50k OTR, around RM2k is the insurance portion, whereas for used cars, the asking price does not include insurance, road tax, registration fees, runner fees etc. So let's say after 5 yrs the RM50k car is now worth RM35k, the actual depreciation is RM13k and not RM15k.
If you want to enjoy a higher selling price, you should try to sell your car privately. I sold my old car personally, as well as helped my relatives sell theirs and in the process saved between RM4-8k compared to trading in to a used car dealer.