Checked out their site, and either my browser is skewed, or the site is, as it loads kind of offset from the norm - words overlapping, etc. The agents' bios are interesting - Mr. McKinney has had "decades" of experience, except not in agenting, though it does say he worked at the "publishing house of Simon and Schuster" (not specific about what he did there). Ms. Conlon is degreed, and Ms. Sanders has a love for reading, plus a background in child development and interior design (I don't know how those equate to knowing the ins and outs of being a literary agent). Mr. Hoover "has been in the literary business for over a decade and has authored three novels", yet still I don't see any indication that there is experience as literary agents.
They also list their clients, but not sales.
But, as CaoPaux says, we'll have to wait and see. Who would like to be a test subject?