Almost all of the games I see listed do not offer any information on average session length. Adding a drop down selection to state in hours, or half hours (2 / 2.5 / 3 / 3.5 / 4, etc) how long a typically session for this campaign will be. Many sessions will go over or under but a few minutes, but if it states typically 6 hour sessions and I only have about 4 I know not to apply and waste any ones time.