Thanks---yes, I remember Quantech now that you mention them.
My preliminary results:
The R*hm 0805 13.3k parts are by far the worst. In the test circuit the noise was 25dB above the reference standard of a 1/4 metal film axial part, probably from K*a Speer by the looks of the body.
I got P*nasonic and Y*geo 0805, 1206, and P*na 1210 parts today, as well as some D*le RN60 axials.
Ideally there should be many more tested to get any kind of decent statistics, but life is short. Here are the results, as noise excess compared to the reference 1/4W:
P 0805: +15.1dB
Y 0805: +15.1dB
P 1206: +14.5dB
Y 1206: +12.7dB
P 1210: +6.8dB
D 1/8 axial: +1.6dB
Noise Bandwidth was about 5Hz - 470Hz; The average voltage was eyeballed over many seconds of observation from the voltmeter function of an HP 334A---the analog meter being much easier to observe than a DVM. The test circuit (a replica of the SMD PCB with leaded parts except for the devices under test in the most susceptible location) output fed a preamp with a gain of 800 and negligible self-noise, and there was a one-pole lowpass filter with a -3dB point of 300Hz, hence the noise bandwidtrh was 1.57 times this. The noise is predominately 1/f-ish with probably most of the energy below 50Hz from the look of it on a scope. For the measurements the test circuit was shielded to reduce hum pickup.
I have yet to get any MELF parts.