From what I understand, yes. My brother who is studying to be a librarian recently found this out and was kind that he had never been told that similes are in fact a type of metaphor.
Someone who agrees:
http://www.copyblogger.com/metaphor-simile-and-analogy-what%E2%80%99s-the-difference/
Trope: Ex: metaphor, simile, etc
A metaphor
A metaphor, a simile uses the words like or as.
simile
that man
simile
simile
simile and METAPHOR AND PERSONIFICATION AND CHEESE
simile
simile
Its a metaphor
As quick as a wink is a simile. ----