Location of Piano Hammers

Are there any piano tuners out there who could verify (or comment on) the veracity of the following statement regarding the location of the "hammers" on a piano, found at : http://www.phy.mtu.edu/~suits/badnote.html

"If the string is plucked or struck at a node of a mode, then the corresponding overtone will not be present in the sound. Hence, plucking or striking the string 1/7th (or 2/7th,..) along the string will remove this dissonant overtone from the vibration. The hammers in a piano, for example, are located at a node of the 7th overtone for this very reason."

Curiously, J Gill

--- In tuning@y..., J Gill <JGill99@i...> wrote:
> Are there any piano tuners out there who could verify (or comment
on) the
> veracity of the following statement regarding the location of
the "hammers"
> on a piano, found at : http://www.phy.mtu.edu/~suits/badnote.html
>
> "If the string is plucked or struck at a node of a mode, then the
> corresponding overtone will not be present in the sound. Hence,
plucking or
> striking the string 1/7th (or 2/7th,..) along the string will
remove this
> dissonant overtone from the vibration.

This is all true (except the "dissonant" part :)

> The hammers in a piano, for example,
> are located at a node of the 7th overtone for this very reason."

Not true, not on modern pianos, at least.