[CQ-Contest] Call Sign Weight

[Joe]

There are many online weight calculators for Callsigns.

As far as I know, they all only tell you more or less how long it will 
take to send a callsign.

Is there one that also takes into account not only speed, but possible 
difficulty in a call being copied correctly?

Like ones with letters  that most people have hard times learning in the 
first place.

Or the infamous calls that are made from mainly dits sent at a crazy 
speed, we all know those calls.

So I know that is asking of a lot and probably not possible, but hey I 
gotta ask, is there a weight calculator that also takes into account the 
real world of callsigns?

Joe WB9SBD