As you pointed out, SMB multichannel is a feature of Windows Server 2012 that works with connections to clients running either Windows Server 2012 or Windows 8. Because support from the operating system is required to create multiple TCP/IP connections, you will still only have one connection with older versions of Windows. Therefore, one SMB connection will not make use of the additional potential bandwidth in your team.
Teaming ports will give you fault tolerance, but if your main concern is increasing the speed of a transfer between one client and one server, then you will probably see the best performance by not teaming the ports. Creating a team will add the overhead of having the ANS team interface. The overhead is worthwhile when you have multiple connections or when you need to add fault tolerance.
For those of you who are wondering about SMB multichannel support in Windows Server 2012, check out The basics of SMB Multichannel, a feature of Windows Server 2012 and SMB 3.0 - Jose Barreto's Blog - Site Home - TechNet Blogs.