DateTime, Date, and Time Serialization for Yukon

Michael Rys, SQL XQuery PM, is asking for your help on the appropriate serialization format for DateTime, Date, and Time within SQL Server Yukon.  Go to Kent's blog and cast your vote.  Here are my wishes:

Q1:xs:datetime-2, xs:date-3, xs:time-1

Q2: 2

Q3: Yes

Q4: Alt1