It's been my experience that cruiser groups typically ride at around 10 over the limit when on 2 lane roads.
My experience is that large cruiser groups ride 10 k below, or maybe at the limit on the straights, and slow considerably in the corners. That makes sense given the difficulties riding in a tight group (see above). Sport riders tend to stretch out to take the line in the corners.
If if you can't hack driving only 10 over (cough, cough) then that's not their problem, that's firmly yours. You don't get to push traffic off the road just because you feel the need for speed and consider the posted limit a mere suggestion or encumbrance to your enjoyment.
Ever heard of the concepts of "design speed" and "85th percentile"? Posted speeds are political decisions which change (either up or down) with political pressure. If its safe for two lane roads in the mountains in BC with grade changes, curves and other visual obstructions to be posted at up to 110, then why must straight open concession roads in Ontario be limited to 80, or even 60 in many cases. If an SS rider wants to risk a fine by going higher than the posted limit, that's their problem. The differential between posted limits in Ontario, and the speed at which up to 85% of drivers are comfortable driving at (the 85th percentile) is so great that even Corollas are regularly cruising at 10 - 15 over. If Cruiser riders want to ride slower than the flow of traffic, that's fine, so long as they don't do it in groups that are so large, they make it impossible for others to get by, thereby making it everyone else's problem. Not much difference than 2 transport trucks side by side doing 105 down the 401 with a mile of cars behind. If the New Zealand 5 car rule was applied here, Harley Trains would be illegal.
And as I mentioned earlier, perhaps there's a new rider amongst the group, hence the speed. Or would you rather they all drive beyond their abilities (because the SS guys are all invincible rocket ships and would never crash) and we're all saying RIP in the fallen riders forum at the results?
If new riders have difficulty with an 80 k speed limit, they certainly can't handle tight formation riding. Experienced group leaders should realize that they would be putting these rookies and the riders around them at risk. If they were at the front of the group and went down, the pile up could be horrendous. And don't think accidents are limited to sport bikes. Unfortunately images from news reports seem to show just as many mangled cruisers as sport bikes.
All this thread demonstrates to the public is that most SS riders just want to go whatever speed they so desire, everyone else on the road is but a mere obstacle to blow past at or near 172 territory.
To follow your logic, then most cruiser riders just want to show how tough they are by riding as a gang and couldn't give a carp about who they obstruct or intimidate.
Freakin relax. This "us vs them" mentality amongst cyclists is rediculous when we're all enthusiasts of the same very limited hobby.
Total agree, I just don't see how you make this the conclusion to all your contradictory comments above!
If a very fast cruiser wants to pass me, I do nothing to prevent it. Why would anyone behave like that..? 
