Disagree. We can attribute the feat to Penny's thrusters activating to the max + Maiden powers boosting the thrusters, though this doesn't necessarily reflect on her regular strength.
Penny decided to take a breather to prepare for a burst of Maiden powers against Ace Ops, and she was trying to hold herself back and prevent the virus from controlling her against RWBY/Jaune/Emerald.
Also, we need to balance with a number of anti-feats, so giving the vast majority of recurring characters the same rating based on the most extraordinary Lifting Strength feat doesn't check.
Ruby was shocked that Penny was capable of stopping a speeding truck (Penny's artificial skin on her hands were torn off as well). Ruby knows that Penny is a student who came to fight in the tournament, so this demonstrates that Penny has much more superior Lifting Strength than regular characters:
| Ruby: Penny! Please! What is going on?! Why are you running? How did you do that?! |
Ruby quickly collapsed when she tried to carry Penny; Penny is properly heavier as an android but nowhere close to Class G:
Gray in the volume commentary states that Ruby ran out of steam since she is not used to carrying so much mass:
Monty: And then this, and this thing.
Kerry: Yeah he,
Gray: You guys spent forever on how to look like, make it read that she was running out of steam early 'cause she's never had experience with that...
Kerry: Yeah.
Gray: ...that much mass before. |
In the Amity Tournament, Nora brags about her strength by... stating that she can bench press five times her own weight. Authors clearly don't think their characters have the Lifting Strength argued in the OP:
| Nora: We've got a world-renowned fighter on our team, what's basically a ninja, I can bench five of me... Jaune... We've trained all year, our weapons are awesome, Glynda barely yells at us anymore and... Uhh... Jaune! |
Sun struggles to stop a runaway cart with two clones:
Sun's clones struggle to lift a wooden balcony with Ghira, and collapse when Ghira moves away:
Yang struggles to lift her motorcycle from snow:
In the last Volume, Qrow fails to push Ironwood's bomb, which was previously carried by four Atlesian Knights, and he desperately resorts to Clover's charm: