When I switched from -300 to -800 I had some firm ( and very firm ) touchdowns during the first couple of weeks. You get the hang of it very quickly. With flaps 30 it's about the same as the -300. Flaps 40 is a completely different story to me. It's absolutely not as forgiving as the -300, if you screw up during initial flare you can forget about a greaser.
Most of the times a real greaser is completely wasted anyway because of the spoilers coming up so rapidly after touchdown, slamming the thing through it's struts. And to make matters worse, earlier serial numbers have modified shimmy dampers on the mains that will shake you up completely.
If you just use normal landing ( boeing ) technique you will get reasonable landings 9 out of 10 times.
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