Don't confuse strength with flexibility. Strength is the amount of force required to break something which, in this case, means deforming it so it doesn't spring back to the original shape. Flexibility is the measure of how far it deflects under a given amount of force as long as that force is less than the breaking force. These measurements are totally different.

So thin-walled hi-ten might be vulnerable to breaking, but until it breaks, I expect it to behave and feel like thin-wall higher-ten, to coin a term.