How odd that the dust up occurred on the last day of the May ratings sweeps. !!
Not odd. Rosie wants to be the next Jerry Springer. So sge launches the attack to: reduce Elisabeth to tears (and as a bonus, admitiinmg she was a "bad friend" for not defending Rosie). Result Rosie leaves the show, having proved that she's strong, and that everybody (even the Christian conservative chick) luvvs her.
But she forgot, or didn't think she needed, to give a copy of the script to Dlisabeth.
So whether it was pregnant women hormones, or sneaky Survivor chick knowing the right time to go 100 pound gorilla, it didn't play that way.