Intriguing general approach. I would suggest you can keep the speaker "Mr X" a secret. You can keep certain seminar details a secret.
I'm skeptical about keeping everything a secret.
Right now the letter is rather information poor. You do go into a little detail, finally, in paragraph 9 "He'll show you." But it's still hide-and-seek.
This aside from the fact I feel employees "..that arrive early and stay late" are
probably the ones you want to fire.
And introducing bits of unconventional wisdom is something which 1) Gives your mystery expert something to "Kick you in your assumptions" about. 2) Explains there is something the reader might not be doing that you are. And I would guess "working harder, not smarter" isn't exactly unconventional wisdom, nor is there a particularly big market for it.
In all the letter doesn't support the headline. You don't have to say who the person is, but you don't go into anything which makes this guy "tough" or "a bastard." You're not using this in your letter ...at all.
My suggestion is you're missing an opportunity to increase the credibility of the offer. You want to "warn" the reader, with a qualifying challenge. Think of the form "If you can bag your own groceries, then you can save 18% on your food bills."
In this case "If you can ....put up with [fill in the blank], you can increase profits dramatically." Where you fill in exactly what makes this expert a tough bastard.
You should also go into a backgrounder. Explain this guy turned around this business which had that specific problem the reader might have.
...it all just felt a little “sleepy” isn't a specific problem motivating people to go to a seminar.
If you haven't positioned the speaker's toughness as a clear business advantage, the reader impression it's generic business advice from someone who's nasty. It's toughness without a reason.
What this all boils down to is there is no detail or information in it. You start off with a promising theme "tough bastard," never to use it again in the letter. The reader has to be told why this guy has faced a lot of tough challenges, in a variety of businesses, with specific solutions. And will be talking about specific solutions to painful business problems.
The letter therefore fails the "so what" test. Go back over every sentence and ask "so what?" It if doesn't answer the question and doesn't further the theme you've set, eliminate it.
Related: Jim Collins on
Confronting the Brutal Facts supporting the premise of how companies go from good to great.
Often I've found people -- the one's who don't go into defensive meltdown mode -- are twice as good at writing about their product when they're defending it against one of my critiques. For one thing, they're ten times as passionate about their product ...exactly what they kill off in their boilerplate, swipe file by-the-numbers hack jobs.
They're not copywriting, that's not even
writing ... they're typing.
That emotion and enthusiasm for the product is what needs to get into the copy. It won't happen by intellectually pointing out the facts. And that's a way to position "toughness" as a valuable business asset.