Here we make use of simulations with a simplified GCM to understand why the annular mode-like response to a forcing depends on the structure of the climatological jet. It is found that in response to heating of the equatorial stratosphere, the mid-latitude jet shifts poleward and that the magnitude of this response is highly dependent on jet structure, with lower latitude jets having a much larger response to the stratospheric heating. Recently, many studies have investigated the mechanisms for production of such a response and several of the proposed mechanisms depend on a feedback between the eddies and the mean flow. In these stratospheric heating experiments it is found that lower latitude jets exhibit a larger response due to a stronger feedback between the eddies and the mean flow. The reason for the dependence of the strength of the feedback on the climatological jet structure will be discussed.