Using Beatrice voice. Here are some examples. XCode 4.6, SDK 6.1, IPad 6.1 simulator
Words in a sentence that pop are below in [bold]. Words that do a quieter click are in [italic]
[Hello], this is Beatrice
One fine evening a young princess [put] on her bonnet and clogs, and went out to take a walk [by] herself in a wood; and when she came to a cool [spring] of water with a [rose] in the middle of it, she sat herself down to rest a while. Now she had a golden ball in her hand, which was [her] favourite plaything; and she was always tossing it [up] into the air, and catching it again as it fell.
The same text in Elliott voice sounds much better. I think I only noticed one click in the last sentence…
…and she [was] always tossing it up into the air, and catching it again as it fell.