My opinion?
DMG SUCKS! The racing is mediocre. But the upper echelon of racing SHOULD belong to the fastest riders on the fastest equipment. DMG says the Jap Big 4 has to run bikes that are for sale to the public and Street legal (homologated). Now, they say a $40,000 Buell 1125RR, non-street legal, road race bike is DMG legal. WTF??!!
The Buell 1125R in Daytona Sportbike winning against 600's? Well, if you look at the past track record of its rider (Danny Eslick), he wasn't the fastest on a 600 before and was never championship material. But he was a good rider. Now, on a bike twice the displacement of his competition, he's winning just by a slim margin. Sure, good racing. But...a good but not great rider (compared to Martin Cardenas, Jaime Hacking, DiSalvo, Roger Lee Hayden) can be turned into a winner with 40 more HP.
Close racing? You can actually see some damn, good, close racing with your local club race organization. For us SoCAL guys, we have WSMC and WERA West. The WSMC Formula 1 race between Jeremy Toye and Jeff Tigert, 1st and 2nd, was separated by 0.036/sec!! Now that's tight racing.
I'll stick to WSBK (damn good racing there), and MotoGP (been damn good as of late) thank you very much.