It was?

Somebody describe brown rot please.

It is best to take most of what Ciscoe says with a large grain of salt :-) While the pathogen that causes brown rot can overwinter on twigs, stems and branches or mummified fruit, this past winter would be no more likely to cause problems than any other. In fact, because of the intense cold experienced from time to time, chances are many of the holdover spores were destroyed. The proliferation of this disease typically depends on a combination of spring weather factors rather than winter conditions anyway. And while it can affect various members of the Rosaceae, it tends to be most prevalent on stone fruits and their ornamental cousins - cherries, plums, peaches.

Here is a link that might be useful: brown rot

Some years Higan cherries (Prunus pendula, P. X subhirtella) in particular are really hammered, with large sections of the canopies of some specimens blighting off. This was not one of those years.

As for your Serviceberry, what symptoms does it have? If orange stuff on leaves and immature fruits, it's rust, a common affliction.

As for the quince, could be one of several things -- so we need to know what problems you see.

Gardengal said:
"this past winter would be no more likely to cause problems than any other. In fact, because of the intense cold experienced from time to time, chances are many of the holdover spores were destroyed."

I don't know how "intense" the cold was where you are, but here -- even though colder than usual -- wasn't cold enough to kill spores.

Then, too, the weather during spring also affects how challenging brown rot and bacterial blight will be. Dryish weather means we have less than usual; moist/wet/misty all encourage the foliar/fruit diseases.

Beyond that, in our region, we've been seeing a lot of bacterial blight on the stone fruits -- cherry (both flowering and fruiting) and plums/prunes.

Gardengal48, thanks for the link.

According to the Farmer's Almanac, this spring is cooler than normal.

Here is a link that might be useful: Farmer's Almanac Long-Range Weather Forecast PacNW

I haven't been seeing more damage than usual, so far. In fact, looking out the window at 'Pink Cloud' I would say that (at this stage, anyway) it has far fewer dead twigs than in recent previous years, perhaps also with larger-leaved, more leafy new growth than before. I've also noticed a 'Temari'-type Sato-zakura south of here that is often marred by dieback not seeming to have as much of it as usual, and definitely having a burst of lush rich green new growth like I've never seen on it. A Yoshino cherry within walking distance also seems to be having a banner year.

Up to this point a general bountiful flowering of numerous unrelated plants has been noticeable. Now it appears some kinds are also growing better than usual as well.