Blogspot Word Verification: Is It Working?

In the settings for this blog, under "Comments" is, "Show Word Verification?"  Yes/No.

I have the radio dial set to "yes."

I checked my blog at a friend's house (so I could see what the public sees) and did not see the Word Verification.

So I am asking my readers (all five of you) to just drop a comment and let me know if the Word Verification shows on your end.

Thanks!

PS: What is the advantage of using it?