Bula,
I think you totally miss understood WHO '4SPOOLED' was talking about,
'blue tailed boys' , I also immediately thought Seneca. There is one more operator that fits the same description to which engine failure and glide would apply to in the same sentence, I'll give you a hint, they fly C172's, I can't see how engine failure and glide would affect a Seneca, they have a back up. I'm also pretty sure everyone knows too that a twin needs to fly a slightly larger circuit. Its all proportional to speed.
As for the Grob's policy to fly wider circuits than most others, thats how unvalidated rumours start. The is no such policy boys. Probably misunderstood as the Grob will out climb (1000'/min) any trainer in JT and so often req's to extend upwind too prevent cutting in on that C152 which is still staggering through 200', meanwhile the following Grob is already at 500' ready to turn.
Cheers, Stiffy
