That’s a brilliant bet !! But must have seemed unlikely when you placed it?I actually got 16/1 on us to finish top half a couple of months back. Not looking too bad a bet now as we're only 1 point off 12th now!
15 points from 8 games is ~1.88 points per game - over a full season that would give them ~86 points
86 points would have finished 3rd last season; 3rd the season before; 2nd/3rd the season before that (depending on goal difference).
Generally the top spot has been either above, or very close to, 2 points per game. Lincoln are currently top with 47 from 23, 2.04 points per game.
No denying Cheltenham are in a good run of form right now, but the pedant in me would say it is not champions form. The gap to "top half" is only 7 points so I'd agree that 6/1 is a decent punt at this stage of the season, but the cautious voice in my head says wait until after the January window is done and dusted.