Just means the additive pack is doing it's job properly.
Yep. However, I have always noticed that new engines keep the oil lighter much longer than older engines, but it's certainly nothing to worry about.
This reminds me of the clutch fluid (DOT 3 brake fluid) getting dark fast, from heat, in my 84 Venture. Yamaha says to ignore it when it gets black, just change it at the recommended change time regardless of how dark it gets before then. The same holds true for engine oil on all vehicles, AFAIK.
The only exception I know of is the tranny fluid in automatic transmissions. If it turns brown, it's time to have it flushed out.
BTW, vehicles such as the TTSE that are designed to ONLY use synthetic engine oil will go a lot longer on an oil change than a vehicle with synthetic engine oil that is designed to use both engine oils. Every owner's manual I have seen has said something to indicate such. Such as stating synthetic engine oil can be used as long as it is changed as often as the dino oil recommendation, which might be as low as 3,000 miles. IMO, there is NO realistic advantage of using synthetic engine oil except in an engine that is designed to ONLY use it, such as our TTSE.
I wonder how big of a debate that statement will cause here.

But just read the owner's manuals as that's what I will almost always agree with.
-Don- Reno, NV