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Average case lower bound for sorting

Submitted by: @import:stackexchange-cs··
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casesortingboundloweraveragefor

Problem

The $\Omega(n\lg{n})$ lower bound for sorting in the comparison model is well known. Is there a similar average case lower bound for sorting in the comparison model and if so, which random distributions does it apply to?

Solution

In the Sedgewick-Bentley talk "QUICKSORT IS OPTIMAL" they give an (informal) proof that Quicksorts average case is optimal.

So the average case lower bound for sorting is $\Omega(n\lg{n})$.

Context

StackExchange Computer Science Q#41254, answer score: 2

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