The answer depends largely on intent (is the bill meant to be exclusively for startups or are the terms more inclusive) and consequently, on how you define a 'startup'.

Let's assume a hypothetical company in operation for 15 years outside the US with > 100000$ in revenue from the US market. 3 American hires now effectively represent an immediate ticket to a Visa for the founders. If I might hazard a guess, there'll be thousands of companies clamoring for a piece of the pie.

If this is intended for, I stand corrected (and I must add I think the bill is revolutionary). But 'Startup' Visa might then be a bit of a misnomer.