And then I complain that I didn't get a good review. (sarcasm, no extra charge)

Hotel clocks are usually set before we get there by travelers who don't want to miss the free breakfast or their flight back home.

With all the cell phones in the world, who goes by any clock anymore?

It would be great if hobbyists would take a great big "benefit-of-the-doubt" pill rather than jumping to all of these suspicious and overly paranoid conclusions.

When I do an outcall, I usually have no idea when I got there, never look at the time one way or another, and leave when it seems like the date is over. Sometimes that is over 3 hours for a 2 hour booking (no, I don't charge extra for the extra time if I'm having a good time and want to stay longer).

I certainly would never think the guy set the clock back ten minutes to trick me into staying longer! Geez, really?

I have heard of ladies that do this intentionally, which is just wrong.  The first thing I do after the bellman drops off my bags, is to check the clock to maike sure it is correct.  Half the time, I can't figure the silly things out, so I let my gentlemen know if it is off.  It's called common courtesy.  

  To the ladies that do this, what if the tables were turned, and you scheduled a one hour massage, and only received 50 minutes?  I bet you would complain.

Hugs and Kisses

has an entire chapter titled "How to Change the Digital Clock in your Hotel Room to Shorten a Session."  But seriously...
If you check the hotel clock when you arrive it's hard to be confused.  Only if you or she checks your watch and later the hotel clock could any confusion happen.  I noticed the hotel clock in the last room I was in was fast, too.  But if you check right when you get there, it still takes it the same 60 minutes for it to advance an hour.  If you have a concern, you could mention it to her without insinuating it's a plot to screw you out of ten minutes of hot sex.

Set an alarm for 50 minutes from when you walk in
Done.
Or just note the time when you walk in. Honestly the only time I have problems is with agencies, that's when I employ the above.

and it is indeed often 5 to 10 minutes fast.  I've almost never had a problem getting the full amount of time, but once or twice I had to mention is at the end.

There was an MP I used to go to and their clock was always ten minutes fast, but when the gal left the room and told me to get ready, I'd reset it.

It would always be back the way it was when I came back the next time.

I travel allot and have noticed that the clocks in many hotel rooms are about 10 minutes ahead. I do not know why this happens but I doubt it is the provider.

I make it a point to make sure the clock is not in the room..

At one time there was a clock in there but it was set for some crazy hour that was obvious that it was not the correct time...

Just set it for the correct time at the start of the session and when it reads the correct time again, the session will be over.

keep it plugged in, I have reset the darn thing; invariably, it's a couple of HOURS off. Did the last person need Midwest time in Eugene? Sheesh.

Sometimes, I'll turn the clock on its face so I can't see the time. Sometimes I simply unplug it. As Mocha said, there are other ways to keep track of time...