I was reminded of something from my very first manual for Microsoft back in 1986. I was updating the Multiplan 2.0 manual to Multiplan 3.0. My 3.0 manual was the first Microsoft manual ever to receive an "Excellent" rating from InfoWorld. I can still quote parts of the review--"documentation compares favorably with any first-rate manual we've seen" and "Because the manual is top-drawer work and has no flaws, we rate it 'excellent'." Happy times.
But I digress here. So, in the previous version of the manual, there was a standard Welcome section in the front that affirmed your wise choice in having purchased such a fine product, and that discussed the features that it had and how they would make your life easier, longer, richer, and healthier. There was a lot of marketing drivel in it, but it ended after 2-1/2 pages with the classic line "You'll soon have a firm grip on a powerful tool."
Naw, it weren't just me.
I ultimately checked with the author and he said that yes, he'd snuck that one in there to see if anyone would notice. They hadn't.