ah well, there is a 'bug' or artefact of gif that causes a bit confuserisation
a gif with a frame delay of 0 seconds will play slower than a gif with a frame delay of 0.3 or 0.4 seconds in firefox and chrome
( ,
Sat 12 May 2012, 15:26,
archived)
on one of my phones a delay of 0 runs at full speed though
so it's not a consistent thing that can be relied upon it seems
( ,
Sat 12 May 2012, 15:34,
archived)