The population of 24 team traditional leagues (only two) is an insificient number to base any statistical evidence onto.

In actual fact, including all leagues - trads of which most are 20 team leagues and Real Time of which all are 24 teams)there is currently 18.75% openings in the 20 team leagus while there is a 21.18% opening in the 24 team leagues.

Considering the fact that two of these have only one opening (a 4.16% rate)it's even worse for the 24 team leagues. I don't believe that is because they are RT vs Trad but who knows. Some managers are in both but some stay away from one ot the other.