I would add to this that GOP poll numbers always suck during the Summer months. It happens like clockwork. Democrats always do better when people are not as focused on politics (or are on vacation, as many are this time of year). Adding to the skewed numbers is that pollsters are still polling "adults" rather than likely voters.
This year seems no different. This is especially true in Congressional races, which are not decided based on national poll numbers (the correct point of this article).
Of course, it is not being held today, and I am confident the GOP will make some moves in the upcoming months to try to reenergize their base.
In the end, I think we are probably looking at another status quo election.