Appreciate the confidence, but I think I'd place more weight on your casual observations TBH. I was not really particularly thorough with my testing on this occasion: battle map mechanics aren't really my thing.

Anyhow, if I remember the original post by Jerome corerctly, he did hint that it wasn't quite so simple as 1 point to attack per command star but I never got round to robustly testing it. For example, one possible theory is that the bonus is 1 point per command star subject to a maximum of 50% of the original attack stat. This would mean that peasants (the unit I used) would get no attack bonus from a 10 star general, whereas a decent unit would get a fair bonus and an elite unit would get the full bonus. I think that would be a good way of handling it, as it would neatly remove the somewhat unrealistic situation of a 10 star general making a bunch of disorganised rabble into a reasonably effective force, whilst still allowing a good general to have an effect on better trained troops. I don't think that is how it worked though, but I never did the tests to rule it out.

As an aside, the morale bonus definitely worked as advertised in RTW.

Edit: Jerome's explanation and my observations.