Actually the first statement is not entirely true

I was invited to a BR match in August this year, and as I only own Tac style rifles went to the shoot with what I had. The line left ALOT of space between me and my bipod supported mag fed Tac rifle and the BR rifles on their fancy mechanical supports. Despite feeling like trailer trash from the wrong side of town, I held my own (not finishing last), learned ALOT (thanks to the local BR guys) and had a ton of fun.
Hopefully I will have all the required bits soon so I can then proceed with building my own BR rifle with a slightly Tactical look to it.

Your second statement I wholly agree with. There are some factory produced rifles that do shoot well, but my money would be placed on a skilled shooter producing better consistant groups with a custom rifle than an equaly skilled shooter with a factory rifle.