Software default settings are very seldom correct for YOU. For example, a device may say that a SQL server should respond in 50ms. But, if that device is across a WAN with a 200ms ping time--that is highly unlikely. This causes false SLOW SQL messages. This is only an example, but there are many such alerts and messages based on default "thresholds" within this type of software tool's configuration.
Particulars of your environment may create false alerts or other messages. The definitions of what is an “excessive” delay--latency--broadcasts, etc, are up to you--not the tool. Read more at OCModShop.