Timing can be thrown off from something as simple as a birds nest on some of these newer machines...it doesn't take much. On the older machines, the set screws can loosen and the timing will change just from use.
If you are the type of person that cannot loosen a screw, then by all means, do send it out. If you do not understand the difference between a timing issue and a bent needle bar, then you should send your machine out for repair. I have timed machines since I've been 11 years old( my Dad had an authorized repair shop for over 40 years), and it is a simple procedure that takes only a few minutes for a person with a basic knowledge of their sewing machine. Candace asked how to time it, I answered her...it was up to her to decide if she had the confidence and ability to do it.