No, that's not a good assumption at all; it would be false for most inexpensive gigabit switches. And unfortunately it is often quite difficult to find independant reviews that aren't just a rewriting of the advertising brochure.
Someone did point out an inexpensive linksys to me recently, for which I -was- able to find a positive independant review; it was the SD2008 (a design from a couple of years ago), and the review is at
's pretty good considering the price, but it does *not* get gigabit at minimum packet size (which is what Cisco measures), and the latency creeps up with packet size. The SD2008 is completely unmanaged. I found a number of reviews that says that the fan on it is quite noisy and that it runs hot; one review said it ran quiet and cool, so it is possible they changed the fan design along the way.
Consider the SRW2024 instead -- at least you'll get WebView so you can do some remote configuration.
The SR2024 and SRW2024 both review as having a loud fan.
Real information... hard to find. There's some nuggets here,
I found a mid-sized thread from someone using the SRW's who couldn't get more than 300 Mbit/s throughput; no-one was able to come up with anything that helped his particular situation (whatever the actual cause was.) There was a useful resource in there,
"Squeeze Your Gigabit NIC for Top Performance"
I skimmed over lots of other links, but the rest was just fluff or ads or people asking whether anyone knew anything about them...