The House Polls seem to always have heavy sampling of seniors, which I think is the reason why Huffington Post (which includes every poll) usually leaves this poll out. Nevertheless, the high number of people surveyed, and its results in general, are a strong data point supporting all the other polls, except for NBC/WSJ’s second bulls*** poll.
This is more about making Rubio/Bush look better than the dead in the water candidates they really are.