Alex is my preferred voice. I have not found it to cause any delay. When I explored using several voices for different functions in different Applications I noticed a delay when changing from one App to another. I wonder whether your key speed id set too slow. You can adjust this in the keyboard preferences. TF On 22/05/2013, at 2:40 AM, Andrew Ireland <andrew@xxxxxxxxxx> wrote: Hi Guys, I am finding Mac Mail very sluggish, when navigating up and down my messages it's not very responsive at all. I have a friend that can replicate my problems. Anyone else noticed this? I have still to test, however, I was wondering if it is the voice I am using that is causing the sluggishness. I use Alex. Any tips or tricks would be most welcome. Thanks in advance, Andrew.