via press notes:
Last night’s EMPIRE drew 750,258 tweets during the live broadcast — a record high for the show.
And EMPIRE has now surpassed The Walking Dead in average tweets per episode (live/new eps 9/15/14-3/11/15):
o Empire – 451,270
o The Walking Dead – 444,029
o Scandal – 354,085
Source: Nielsen Social Guide / Twitter