Difficult one to explain, but I will do my best.

It may be me, but I have noticed a strange phenomenon when performing fast getaways from a standing start and a fast drive and shift between gears.

From a standing start the clutch has a diffinate bite point and will spin the wheels quite easily.

Trouble is, when I do the same between first and second the bite point does not feel as positive, almost drawn out over some travel resulting me slipping the clutch.

Just so different to when I do the same in my 300zx twin turbo.

Is it me? or is there some sort of ECU involved?

maybe the clutch is starting to wear out.... (and its slipping a bit), from a standing start tyre light up clutch copes with life, tyres warmed up a smidge and the clutch taking the full force into second (and giving up)

Sound like clutch could be slipping. Sometimes you can tell a worn clutch as the bite point seems to get higher. Normally the bite on a good new clutch should be below the half way point of travel. A clutch that's nearly gone will bite a lot higher and sometimes only just bite before your foot comes off the pedal. Although some of the modern hydraulic assisted units can hide impending clutch doom as the bite doesn't seem to move a lot. 

2 hours ago, thanuttiscotsman said:

Sound like clutch could be slipping. Sometimes you can tell a worn clutch as the bite point seems to get higher. Normally the bite on a good new clutch should be below the half way point of travel. A clutch that's nearly gone will bite a lot higher and sometimes only just bite before your foot comes off the pedal. Although some of the modern hydraulic assisted units can hide impending clutch doom as the bite doesn't seem to move a lot. 

Sounds very likely to be the clutch as you say.

It's the original and has done 51,000 miles.

51,000 miles isn't a lot for a clutch but that being said it's all about previous owner/current use. My ex was a driving instructor using a brand new car and it needed a clutch every 20-30k miles and she did that annually. Lol poor wee fiesta saw more clutches than back tyres 😂