Two-whistle mirror chop

[Amesman]

A partner I respect told me recently that, in a two-whistle game, the T should mirror the chop of L when inbounding in the front court (i.e. under the possession team's basket).

I had not heard this before, nor can I find it in the books. Heard of T mirroring L's chop in 3-whistle but not 2. It's actually confusing at times, thinking T might be holding up play for a sub or whatnot.

Is my carrier pigeon slow on delivering this development or ... ?