Absolutely! The same thing happened to me. Going home, it seems a bunch of teeth were sheared off the timing belt without the belt itself snapping. After the mechanic replaced the belt, the car was a bit sluggish. It would start fine, but every so often with no consistency to it, the engine would spaz out on acceleration.
It turns out that the VCT compensates A LOT for a poorly timed engine, but it still needs to be done right. Have it checked!
