Show me some dyno print outs

[ste91]

Looking at those graphs a lot of them are quite peaky, is that a characteristic of the mechanical fuel pump, or simply the choice of turbo?

Also since I've only driven diesels with standard tiny turbos, what's it like with a big turbo just out of interest? Similar feel to a petrol with a big turbo or does it feel more/less sluggish off boost?