Problems with the newly released generic Adderall XR?

I'm prescribed to 30mg of Adderall XR and today I went to pick up my new prescription. The pharmacist told me they had filled it with the newly released generic Adderall XR and it was $20 cheaper so I said sure why not. However, much to my disliking this generic form seemed to take longer to kick in, had much less of an effect, and gave me a "crash" about 3 or 4 hours after taking it. I literally felt like I needed to take a nap as if I had consumed an energy drink and was getting hit with the crash. Overall terrible experience. Definitely not going with the generic form next time. Anyone else having problems with or notice a substantial difference between the traditional Adderall XR and the new generic one?