Not quite, but close. It's not symmetric (300 down and 65 up), and it's not available everywhere, but you can get pretty darn fast on their standard plans (75/35). I have the 50/25 plan, and right now I'm getting around 52/38 in speed tests. I've never tested a Fios connection that was getting less than what the person was paying for it, so yes it's pretty much guaranteed. That's what's nice about fiber versus cable.
Oh, and I was incorrect about their top speed. They have a 500/100 plan.
Those fastest plans aren't cheap, though. They have 500/100 for $299/month, and 300/65 for $209/month. But when you get down to the standard plans, you can get 75/35 for $69/month - well in the range of a small business. 75/35 is more than enough for any small law firm like this. They'll never use up all that bandwidth, even the upstream.
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Matt