I don't think anyone is mate. I don't know if longer words would be harder or just a bit of a different challenge but as long as the main game was still 5 I suppose it'd be ok.
It's no good me giving you this clue, then It's not really a clue, mind . . . . I just wanted to cheer you (us all) up
How did you find it, I've done it too and it did seem a fair bit more difficult but it might have just been an awkward word.
Got it in 3 . Got 5 amber on 1, 1 green and 4 amber on second with 3rd letter as green but the third one took an age.