Slow performance on VMs hosted in Hyper V

Very disappointed after purchasing a fairly powerfull DELL server to find out that any network access to them (TCP/etc) was very very slow!!!!

Well I luckily found this blog article http://www.scotiasystems.com/blog/it-hints-and-tips/slow-network-performance-on-new-hyper-v-server/

And there finding that I was also using Broadcom NetXtreme Gigabit network cards, I simply switched this setting.

and BAAM!  Incredible difference!