David Kanter (dkanter@realworldtech.com) on 11/10/09 wrote:
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>Here's a few great examples on the N-body problem:
>
>http://www.cise.ufl.edu/~jgao/p_final.pdf
>
>They are claiming a very impressive 100X speed up. Look at the hardware they are
>comparing against though. I think they are also using the O(N^2) algorithm.

... seeing the CPU frequency caused me a mild headache.

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The title-page of Badaboom website claims "speedups of up to 20x". Clever people will interpret it as "The maximum speedup on the best GPU is 20x, the average speedup on an average GPU against an average CPU is unknown", less clever people will interpret it as "The average real-world speedup is 20x, the maximum maybe even more".

The marketing logic on selling video transcoding software dictates that the sample videos have to be either cool, or beautiful, or should contain smiling people. This practically ensures that people will buy the software without asking questions such as "what is the usual speedup?".

The same can be told about slides: a slide does not need to show the whole truth as long as it is beautiful.