Does the sentence 'Boy, are my arms tired' mean 'Boy, my arms are tired.'?

After a short interjection of amazement / delight / relief / exhaustion, inversion is not uncommon but only with a limited subset of interjections:

• "Wow, is she having fun!" [YouTube; Grandma sledding]

• "Gosh, was he a looker!" [Facebook, via Google

• "They beg but man are they cute!" [Tripadvisor.com / Santo_Domingo]

• "Boy, am I glad to see you!" [Farlex Dictionary of Idioms 2015]

'This inversion of standard word order instantiates one type of exclamative' is the only endorsement I can access.

It is an excerpt from Interjections (Chapter 9) - Corpus Pragmatics_Cambridge.org {via Google}

Occasionally, the inversion-form exclamatory appears without an overt interjection:

• "Am I glad to see you!"
• "Is he one lucky guy!"

It does appear at first glance to be an interrogative due to the subject-auxiliary inversion. However, in this instance, the closed interrogative (yes/no question) indirectly conveys an exclamatory statement, the implicit meaning being close to that of the positive exclamative:

How tired my arms are!

The understood meaning is that the speaker's arms are very tired.