I don't think any 2 pole tunnel will take strong wind broadside. Even 40-50 km/h is sketchy with some some decent tunnels. I read a report of "at least" 80 km/h for a Hilleberg Nammatj, a photo showing deformation and the owner reporting he replaced poles after that ("just to be safe").
Personally I doubt even 80 is doable with that tent (without, for example, a snow wall to break the force of the wind). Yes, I know tunnels are designed to flex but a 2 pole tunnel is only strong if pitched tail to the wind. At the risk of staring WWIII only a geodesic design can deal with big loads (wind or otherwise) without the distinct possibility of bent poles. If anyone has evidence to the contrary, I will happily be proved wrong but I think you need only watch that video on You Tube of the 4 pole Hilleberg tunnel getting pummeled and the geodesics in the background looking unfazed. There is simply TOO much give, particularly with a 2 pole design that means the tent gets flattened to the ground.
Paradoxically, I think some 1 pole designs might be less fussy of wind direction and perhaps put up with that (maybe because they tend to be tiny coffins - not that there's anything wrong with that) but I have no hard evidence other than the occasional comment on forums (where people - at least those that don't measure it - likely tend to overestimate wind speed).
Incidentally, the only review site I have found (Outdoor Magazin) that regularly posts videos of tents in controlled conditions (in front of a wind machine) does not consistently report thresholds for wind resistance from tents pitched at different angles to the wind (or maybe it's becuase I don't speak German). However, you can get some insight from variability between tents of the same fundamental design and different designs (there are good and even bad "high end" geodesic tents for example, the Mountain Equipment Helio coming to mind as a poor example from the geodesic stable - failed at 80 km/h from memory).
There is a video of a 3 pole Hilleberg tunnel (MUCH stronger than a 2 pole I think) breaking a pole with the wind side on. While they don't publish the wind speed (that I can see) this occurs at, you can judge by the machine it is lower than it would be with the wind from the end (and I would not be confident the tent could take 80 let alone 100 from the side).
I reckon manufacturers (law suits or not) owe prospective customers some hard data with what tents can put up with. Comments like "wind tunnels don't nearly approx real world conditions" are a cop out (at least that would be a point of comparison if tested in a standard way. Clearly, anyone buying a Helios for expedition purposes is risking breakage (or worse). Granted, UV degradation, and quality of pitch are perhaps more significant than the original design of a tent. [Sorry if I've got my facts screwed about the Helios - but you get the point].