wongtp - wooof has a great understanding of the mechanics of this game and knows very well how this game works. The problem is that the majority of the community doesn't and it's often hard to discern what they actually mean. If they use the term "destroyed engine" a lot of people mean engine damage. Overall I think both of you tended to misunderstand the other or ignore parts of what he said.
First of all, wooof never said that one should use T34/76 to fight a Panther, but rather tried to explain the values and mechanics behind ramming a Panther. I think the style wasn't great though

I can understand him, we worked hard to get an understanding of the game and mechanics. We do not know everything, but a good bit. A lot of people do not know this, but post random numbers or say things work this or that way, even though they are not sure about this. That can easily annoy you a lot. Ignorance, subjectivity and favoritism (real and imagined) are huge problems of the CoH2 community.
Second - I think you still have not completely understood how ram works. At least your previous post showed a lack, so for a better understanding - Upon ramming the following will happen:
If penetration >= armor (which is true for the rear armor of all tanks except IS-2 and Tiger) the target vehicle will get 160 damage and a critical (see below).
If penetration < armor, then with a penetration/armor chance it will be a successful ram (see case above), else it will fail, damage and cause a crew shock.
If the ram is successful a dice is rolled for the outcome. The main gun is always destroyed. With a 70% chance it causes engine damage (.4 movespeed/acceleration), 15% for engine destroyed (.1 movespeed/acceleration) and 15% for immobilized (0 movespeed/acceleration).
A Panther might be able to limp away with a damaged engine, but usually the second T34 can block it off. Still in 30% of all cases with a rear ram and and 17.78% of all cases for a frontal ram it is not able to flee (destroyed engine or immobilized). 17.78% is a lot more than your estimated 5%
Third - Panthers are heavily armored AT vehicles. Trying to fight them with T34 can work, but it's not cost effective. Panthers have a heavy frontal armor, good mobility and a great gun against tanks, yet they are lacking against infantry. A T34, a Con squad and an ATG are worth 280 MP + 85 fuel + 240 MP + 320 MP, totalling a value of 840+85*5 = 1265. A Panther is 520 MP + 145 fuel or a value of 1245. So roughly a Con squad, a T34 and an ATG have the same value as a Panther. Using those 3 in combination (AT nade / ram for disable, ATG for damage) are sufficient to fight a Panther. Soviet Tier 3 is not great in the anti-tank role, but is great to support T2 play (Quad HFT to protect ATG from infantry, T70 for scouting, T34 to chase down or last ditch defense with ram). Using those units alone is not really what they are meant for and will always be subpar to a combined force.