Vinyl Warm Up Time

Mmm very possible. Never thought about that. 
 

I however assume the rest of the downstream setup might actually warm up more. Are you using tubes anywhere (pre amp, amp or mono blocks?) I’d imagine that might have a bigger impact. I’ll try to see if I notice the same. Interesting post! 

Consider psychoacoustics, specifically habituation. As a test, have someone else play 4 records with you out of earshot, then come in on the 5th. See whether after another 4 you get the same sort of changes. If not, there seems to be some warm up, if it does get better, it's psychology.

Start at the Sixth Minute and Listen until the Thirteenth Minute and much is shared about Kinetic Energy produced and Amplitude Migration being channeled within a Cart'. 

https://www.youtube.com/watch?v=fQeut0__a_4

The Following is the Info added to a Very Well Respected Cartridge Producers Web Page about Dampers used in general.

" Suspension

A phono cartridge suspension is like the gatekeeper to success in a phono cartridge. The suspension is typically made with a compliant elastomer material that allows the cantilever to move freely in the dimensions the stylus requires, but also acts to damp resonance coming from the cantilever. It also to stave off micro jitters of stylus in the record groove, and holds the cantilever in its proper place relative to the generator. How much it moves is measure in ‘cu’ (compliance units). It is expressed as a number that looks like this: 10-6cm/dyne@100Hz, or in everyday speak, 10cu. The higher the first number, the more compliant the suspension. The lower the number, the stiffer the suspension (less compliant). The suspension is typically positioned along the cantilever so that it defines the pivot point of the cantilever assembly, and is located much closer to the generator than to the stylus. If designed incorrectly (too stiff, not stiff enough, too much rebound, too long a memory, or treated incorrectly), sound quality as well as stylus/record life will be negatively impacted. Tracking force and even room temperature are further considerations for a properly performing suspension. A correctly designed and applied suspension system perpetuates a stylus that can smoothly and effortlessly follow the record groove, allowing the moving structure at the opposite end of the stylus to interact with the generator in a uniform way. As the suspension is typically made from a variety of rubber, it is susceptible to degradation over time due to shear use, but also due to environmental conditions. A suspension system in a hot and humid environment will not last as long as one in a mild climate, just as a cartridge in a very hot and dry climate will also be adversely affected. If the turntable is in direct sunlight, it will shorten the life. Advances in materials over the years have provided more robust rubber compounds that hold up better, but the very small amount of material relative to the amount of vibrational energy it deals in makes for a very difficult design brief for engineers. In terms of performance, a consistent ambient temperature is the single greatest key to getting a consistently great result from a properly set up phono cartridge. Some audiophiles even place a lamp near the turntable to control the ambient temperature for the
cartridge, and many even keep a temperature gauge nearby. For practical purposes, a suspension too cold is not sufficiently compliant, a suspension too warm is excessively compliant. "

My phono warm up time is about 10-20 minutes. 
 

when I walk away for a period of time, the Pro-ject DS 2 Tube Box goes into idle, it takes 5 minutes to warm up again. 
 

See about page:

https://theaudioatticvinylsundays.com