So around 43% less. (distribution chart say 10 GH/s)
Applied to the entire Hashrate this might as well be around 1834 GH/s max.
right?

How precise is this data?
Hash rate estimates are based on the rate at which blocks are solved, so the precision is relatively low. Errors of a few GH/s should be regarded as normal. (Standard deviation for the total hash rate estimate above: 57 GH/s.)