I own a 2011 Ducati Monster 696 and debated this a great deal. Once again, it seems that oil change interval is much more important than whatever brand you are using in addition to dino versus synthetic. Concurring with what other folks are posting here, shear is the greatest issue with ANY oil, dino OR synthetic in your bike.
I have been using Rotella T 15w-40 every 2,000 miles in my bike along with a filter change at the same interval.
My motor has not blown up, valve adjustments reveal an EXTREMELY clean head area with negligible if any shim wear. Oil screen and drain plug magnet do not show any significant shavings. Granted, I have not performed a UAO yet, but many others here have, and the results speak for themselves. The Rotella held up well during the heat wave last summer where I was seeing 5 bars on occasion...
In my humble opinion, ANY of the HDEO's are EXCELLENT choices for your bike, dino OR synthetic. Delo, Rotella, etc. should all serve you well. I have even found UAO's on the Walmart brand "Universal Oil, 15w-40" (was contracted with Pennzoil, according to the rep) which speak very well and compare similarly with the name brand products.
As for the JASO MA deal, I'm still not sold on the idea of a clutch being damaged by an automotive oil, particularly in the 10w-40 range. Any motocross rider will tell you that his/her clutch sees much more abuse than the typical street bike. I've used automotive oils in this application (10w-30, etc.) without clutch issues. If someone here has PERSONALLY experienced this, I would LOVE to hear about it as at this point it appears to be more of an "old wive's tale"...
The bottom line is that many of the "Synthetic" oils currently on the market do not NECESSARILY compare much more favorably than many of the dino oils. I have used Mobil 1 15w-50, which from the UAO's here and in other forums appears to be an excellent oil. Being cheap (I'm married...), I'll use what fits the bill, Rotella works for myself and many others...
As for those who state that you "must" use synthetic oil in your bike, I'd like to see some serious empirical evidence as to WHY this is so. From an engineering stand point, I'm not getting it...
Your mileage may vary...