As has been said above, we all have our own definition of "slow" or "quiet".
For sure, in my opinion, this industry is not what it was years ago, and that is down, I think, to the recession, and possibly newcomers although I think once you have built up a good reputation you acquire regulars and hopefully have some good feedback on various sites too which of course, counts for a lot.
However, you can't generalise as for a start we are all different so we all appeal to different punters at different times and for different reasons, services etc!
You might also find that when your phone is quiet, your friend's is busy and this is no reflection on you, it's all down to pr, marketing and sometimes your name just popping up on the guy's computer in a search at a certain time.
Whilst we have our methods of advertising and promoting ourselves, it's very difficult to assess how things are going or going to go. You can be manic and busy one day then dead the next. It's very unpredictable.
Things I have noticed is that on a major evening footie game, my phone will go quiet and/or other major sporting events, however on occasion this is not always the case!
Sorry, am rambling now!
Take care girls and stay safe and well.