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I noticed that, and thought that standby being 1/3 less was odd. Must have to do with the A5 I presume.
 
I noticed the 1 hour less battery life on the 4S with Wi-Fi since surfing the web is all I do with my 4.

But I didn't notice the 100 standby difference until now. Could be both A5 and the way they measured the 4S using iOS5. Going to be interesting with the real life test results on this. With the way Apple will start to bloat iOS with background-running apps like Android. I really wouldn't be surprised by it. I really want to see how quickly 4S drains overnight.
 
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