However, there is NO set rules that can be employed by everyone. That's because there are a wide variety of ways to approach various products. If you sell travel services and read a report that told you not to advertise during the summer months, you'd go broke. Don't get hung up on specific statistics made by people who claim to be expert researchers. There is no way to determine what is best for you than to try it yourself and see what works.
Tabloids are a fantastic advertising vehicle and adsheets are too.
This may be true in some circumstances and not true in others. Of course you do. You scan the pages and your eye is always directed to one or two on the page that catches your eye. Classifieds work well in tabloids and adsheets and sometimes they don't. Look in the back of the Globe or Enquirer.