It appears that Lead Sled is largely arguing that the stopping must have been commenced prior to V1.
The decision to stop, and the initial actions to stop must be before V1.
The main problem with this is that without further definition, "before V1" is meaningless.
How much before V1?
I assume that if I suffer an engine failure and take stopping action AT V1 (i.e., V1 - 0 seconds) then I'm not complying with Lead Sled's interpretation. However if I take action at V1 - 1 second then I am. Presumably I'm also complying if I take action at V1 - 0.0000000000000000001 seconds. The latter is of no practical difference to being "at V1" so the phrase "before V1" is meaningless and has no distinction from "at V1" without further definition, e.g., by V1 - 1 second.