Has anyone been to/from Dallas using I35? How bad is it still?

Planning a trip tomorrow and want to have options in case it reaches standstill conditions. It looks like I could go out of my way and use Hwy 177 to Ardmore, which would bypass the Davis rock slide area, but doing so would turn a 3 hour trip into a 4 hour trip. The 3 hour estimate is from Google using current traffic conditions, oddly enough.