Hot Area:

Wrong.

Site 2 / Site 2. Look at the cost of the routes.
https://technet.microsoft.com/en-us/library/jj916681(v=exchg.160).aspx

Site 2 / Site 1

http://techgenix.com/exchange-2013-mail-flow-part2/

Exchange 2013 uses the same logic as Exchange 2010 to select the routing path for a message:

1- Calculate the least-cost routing path by adding the cost of the IP site links that must be traversed to reach the destination. If the destination is a connector, the cost assigned to the address space is added to the cost to reach the selected connector. If multiple routing paths are possible, the routing path with the lowest aggregate cost is used;
2- If more than one routing path has the same cost, the routing path with the least number of hops is used;
3- If more than one routing path is still available, the name assigned to the AD sites before the destination is considered. The routing path where the AD site nearest the destination is lowest in alphanumeric order is used. If the site nearest the destination is the same for all routing paths being evaluated, an earlier site name is considered.