Nice one Bob, as an avid " player " when in pubs I've known for years that this was the case, proof or no. It all depends on the bandit as you say but they do go through " cycles " , after all they have to pay out a percentage although when and what that percentage is, is again as you say down to the program.
This " news " wont deter me from " investing " the odd pound or two...lol, but thanks for the link.. busy d\l ing some bandits now so as to play at home
EDIT :- £4.00 stake & £9.60 out...lol, as Russ D says below, some times there are ways and means..lol