HIDS vs. NIDS market stats?

[Greg Shipley <gshipley () neohapsis com>]

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Does anyone know of any market research papers that have stats comparing
the number of HIDS licenses shipped vs. NIDS licenses?  Or heck, anything
that BALLPARKS estimated deployment numbers?

What I'm trying to find out is which type is more prevalent in the
commercial space.  *trying to dodge the tripwire debate*  My guess is
NIDS, but I have nothing to back this up...

Thanks,

-Greg