I hear ya 80, thats what I grew up on. Last year is the one that made me a believer though, we had 70 to 75 degree water on the spawning beds through most of April and I went back on my blog to note the exact first day we found a spawning crappie in NE KS was with-in a week of the two years before. Now we don't fish every day and I am sure every lake is different but we do a lot during that time of year. Just by going back and looking at the outdoorsman for NE KS the first spawning fish we find are almost alway the last week of April. Last year it was April 30th for us. Last year really highlighted that since we had above average water temps but the spawn still happened at the same time as always. We also caught spawning fish and found lots of beds last year deeper than normal in 8-12 ft of water since the clarity of the lakes where so much better because of the drought. I do think water temps plays a big roll if it's to cold but the more I follow it the less I think warmth triggers it. Just my 2 cents.