If you are implying that my conclusion came from what I was told then I failed to make clear my experience.
When my wife and I made the decision to replace our mower I had two options, buy a new mower or put a deck on the B3030. I decided not to tie up the tractor with mowing duties, but that is another story.
My dealer brought out two ZD's one with side discharge (ZD323) and one with a rear discharge (ZD326). Told me to try them both before I made a purchase decision. My grass was thick, damp to wet (it has rain here daily for better than three months) and was drizzling.
I worked both ZD's for the weekend and drew my conclusion from what I experienced. Perhaps the side discharge handles tall wet grass better than a rear discharge, I do not really know and I don't know why your experiance is different than mine outside of the fact your are running F series and I am running ZD's.
Didn't mean to imply anything. I'm not an imply kind of guy, I just say it. I've had rear discharge decks for over 6 years. First on a rear finish mower pulled behind a tractor (two different models, first was junk and second was a Landpride and it was a tank and great)
Second I've had for 3 years mowing flat rental property with 6 septic tanks which produce high thick grass in a week and I only mow every three weeks, the F2680 60" Rear discharge. Had a 54" side discharge Kubota riding mower before the F so I had a couple of years experience with the side discharge on the same property.
I've also now got a F3080 rear discharge 72" that I use to mow my home property which I also used Kubota BX's with MMM side discharge decks for over 5 years around the house area as well as some of the open yard acreage along with the RFM on the tractors.
So, lest it appear I'm implying something I'm telling my own actual experience over a eight year period giving the actual machines and the amount of time I've used them. I'm not agreeing or disagreeing with anyone elses experience only my own with the years of use using both side discharge and rear discharge covering only the last 8 years of my life because I had only used side discharge decks prior to this time period.
I don't usually mow wet grass, it's very rare that I mow wet grass, that's actually something I avoid when I can.
I've experienced the rear discharge decks distribute the grass clippings spread more evenly over the mowed grass than side discharge decks which cause these obvious rows of cut grass. I don't cut grass until it's tall enough to tell for sure where I've mowed, maybe that caused the rows to be worse on the side discharge.
This has come up before about rear discharge mowers and that's why I was referring to other peoples experience vs mine. Some dealers have expressed their opinions that rear discharge decks do worse windrows on previous threads, I disagree with them due to my experience and not my heards from some body.