Seems like its all on how someone rides, tire brand and make. Fronts get on normal 15-20k and sometimes more. Rears 2-15k. All depends on how you treat them.
There's no simple answer to a question like that! Same applies to fuel consumption, it's all down to how each of us rides, also the brand of tyres we choose. Lidpro's broad range is close enough for rough work! In the scheme of things tyres are not a significant expense, compared with other costs and purchase price, so don't get distracted from finding yourself a nice bike.