No. Disease resistance is not purely a factor of the tree itself; it's a factor of a confluence of conditions. Even a normally productive, normally disease resistant cultivar can succumb to anthracnose if the conditions are right -- nutrient levels, humidity, rainfall, proximity to bodies of fresh water, proximity to ocean, size of baby fruits when anthracnose conditions are present, etc, etc. That is why you'll never find a universally true list of disease resistance rankings. If you look at the univesity of HI doc on anthracnose (
http://www.ctahr.hawaii.edu/oc/freepubs/pdf/pd-48.pdf), you'll see that there is a table that lists cultivar anthracnose resistance based on country (see Table 2). Note, for example, that Carrie is "resistant" to antracnose in Australia and "susceptible" to anthracnose in the phillipines.
The issue that we face here in Florida is that the climatic conditions during fruit set can vary dramatically from year to year. Some years, temps fall into the 30's or 40's when bb-sized fruits are present. And other years (like this year), temps are in the high 80's with heavy rainfall and high humidity.
Trying to rank a mango tree's production or disease resistance based on one or two years of observation is like trying to rank stocks (or the stock market as a whole) based on a single year's performance. One looks at the "trend" over a long period of time and ignores individual years (unless one is foolish enough to think they can time the market).
Your best bet is to plant a wide range of cultivars to ensure that a contingent of trees are productive and good tasting. Ripping out trees to replace with new ones based on current performance will yield a monoculture of sorts where trees are selected based on a limited set of circumstances.
Two things are important in this hobby -- patience and land :-).
Rob, if the flowers are consumed by anthracnose without setting any fruit, are you saying the tree's resistance to anthracnose will improve substantially with time?