Ward says he's going to take a blood test regardless if Froch is or not. That's a lot different from say him demanding Froch takes it, Froch says no, then cancels the tournament. I also suspect Ward is at least partially motivated to do so because of his past relations with Victor Conte and this would "prove" he's a clean fighter.
Ward also said he researched the costs of Olympic style testing, and for 8-10 weeks of random testing it can cost well over $50,000 so he understands why others wouldn't do it if they have to foot the bill.
But hey let's all completely forget that Pacquiao agreed to these tests as well and pretend that never happened because in circle jerk threads, it's about jerking people off.