Regarding BoP levels...
http://results.imsa.com/Results/18_2...by%20Class.PDF
^ Fastest laps of the weekend over all sessions.
Notice the fastest LMP2 car is in sixth, nearly (but still less than) a full second off of the fastest DPi. But notice as well that...
1) The quickest DPi is 0.4s faster than the second quickest - this speaks volumes for the effects of setup.
2) That LMP2 was faster than one of the Acuras and both Mazdas - this speaks volumes for how the big the gap actually is.
Clearly, the DPis have a BoP advantage, but it's FAR closer than it was this time last year, and it is feasibly possible that a particularly good team could still find a setup and driver pairing to match the DPis, longshot though that may be.
In other words, although only one LMP2 driver managed to do so, the fact remains a lap time was posted that was right in the middle of the DPis. That simply wouldn't be possible if the BoP was as far off as is being claimed.
Put simple, the BoP needs work, but it's not the utter disaster many believe it to be.