Did not do a search, so no idea if it has been reported, but some changes to 757 have already been loaded:
01MAR SAT JFK/ EST FRA/#6
13DL 106 J9 D9 I3 Y9 B9 M9 H9 JFKFRA 1925 0930#1 757 D/ 0
Q9 K9 L9 U9 T9
01MAY THU JFK/ EDT EDI/#5
13DL 96 J9 D8 I7 Y9 B9 M9 H9 JFKEDI 2005 0810#1 757 D/ 0
Q9 K9 L9 U9 T9
01MAY THU JFK/ EDT MAN/#5
13DL 154 J9 D9 I9 Y9 B9 M9 H9 JFKMAN 2040 0855#1 757 D/ 0
Q9 K9 L9 U9 T9
Most interesting for me is that FRA is loosing the "big" bird to JFK to be replaced by the 757 on March 1st...it's not an additional 757 frequency to FRA but replacing the existing flight.
Greetings - Dirk