Hi speedmouse
I fly a speedster 30, love it!!! Easy to launch, great to fling about, very light on the tip steering, nice pressure on the breaks . Great flare authority on landing, I find it lively enough to let you know what's going on without being to twitchy even on thermic days.
I fly with a fair few other pilots and don't seem to leave them behind or be left trailing in their fumes, all very similar speed wise, maybe have the edge on some but that could be just me being bias.
I fly with a parajet zenith moster and don't have any trouble getting airborne vary rarely using full throttle,
I use about 5 -6 Lph flying normally, if I flew straight and conservatively I'm pretty sure that could be easily improved.
I'm about 100kg starkers, fully clothed and carrying a full tank and dressed for winter I would think I'm getting near 150 kg on take off
Hope the above waffle helps