@Dana, this one is for you:
Sometimes I wonder
if English haikus should go
five, seven, and five.
Five, seven, and five
comes from the Japanese tongue –
how the language sounds.
This poem here linked
is like a haiku longer:
five, eight, five, seven, seven – oops! Too long!
Listen to the sounds
of the rhythm of the words –
how he says them here:
da da da da DA
da da da da da da da DA
da da da da DA
da da da da da da DA
da da da da da da DA
The stress at the end
doesn’t sound much like English
when used for haikus.
Tl;dr – Japanese poems that use these systems of morae patterns have a different “sound” to them when haikus are read out.