It would make the statewide map cool if each of them won a county. And the nationwide map would be more interesting if Perry won in the >30% interval.
A second place map (or better yet, an "ignoring Perry's votes" map) will be highly interesting if this race doesn't go anywhere from here - which seems likely. There's really no reason to assume any one of the three will be seized on as the Stop Perry candidate, although it's not impossible at this point.
Fact is, and I agree with you on the above, the most likely candidate to seize on Stop Perry momentum is Strayhorn, without a doubt. She has the money unlike Bell and Friedman (Democrats have been contributing to her campaign strongly, not Bell's) and she will have the public pulpit by her position as Comptroller.
The latest drop in this poll to me does not really mean much to her long-term potential in my mind.
Bell is simply a bad candidate. Kinky is, for all his entertainment, too far left on social issues. Along with the "lack of money" issue, they are much less likely to be the Stop Perry candidate.
The key thing to watch out for in the next few months is the school funding debate presently going on in state legislature. If they can get the bill passed and deliver the cuts in property taxes that have been talked about (Texas currently has projected an $8.2 billion surplus in the budget), I wouldn't be surprised if all incumbents receive a gain in support.
If nothing is passed, there could be potential blowback, which might open up the race for the others.