I agree but that too depends on whose tanks you're talking about.... if indias t-72s then they will be slow, Bangladesh's t-59s will also be slow but rubber padding and powerful engine pack on some upgrades can help it through on par with t72. T-90ms will have least problem because of its mediocre terrain resistance and high horsepower. Just a few examples.
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More like guderian proved it on the maginot line of the French. Hitler succeeded until he listened to his general like guderian and Rommel... when he started listening to dumbass like goerig is things became shitty.
Also tanks like panther and tigers bogged down because of their interleaved roadwheels not because of the weight. The mud froze which bogged em out. (Facts for some who didn't know)