I'm not even saying that Target deserves to lose. From what Patrick is saying, it sounds like maybe their website is fine. You don't argue the merits of a case until trial. When Target files a motion to dismiss they're just saying, "Okay . . . lets assume for the moment that everything the plaintiff says is true, and our website is not ADA compliant. Even then, they have no case because ADA doesn't require compliance from websites." This is obviously the best solution for Target, because it means they don't have to go to trial and spend thousands of dollars fighting a class action.
But it doesn't mean that at trial they will maintain those assumptions. They will make the same arguments, but if the site really is navigable, as Patrick says, they'll also argue that they do, in fact, comply with ADA standards. If the claims of noncompliance are totally without merit, Target will counterclaim for court costs, presumably. The blind group can't just randomly select Target as a test case because they want a final answer at leas in the 9th circuit, if not from the Supreme Court, as to whether ADA applies to websites. They may want a test case, but it damned well be someone who really is running a website that isn't ADA compliant, or things are going to get really expensive for them.