Thin provisioning reduce array performane?

Hello everyone,

I recently read in the IT magazine that Thin provisioning reduce array performane (IOPS). There was not mentioned about Dell EqualLogic solution, but this 'problem' relates to EqualLogic array?

In our company, we're using EqualLogic PS6100 Series and practically we're using only volumes with thin provisioning enable.

Regards,
AdamErrot