Ulv, I think you're confusing two different things.
i). Doing an ICAO IR (eg FAA) and then converting it to JAA
ii). Doing a JAA IR from scratch in a country other than the UK.
The original poster is asking about (i). No-one is saying anything derogatary about the standards required to convert (in a given country) compared to learning from scratch (in the same country).
When you came on and appeared to be posting about (ii), I made a comment summarising others' opinions previously posted on pprune. The original poster had, after all, asked about the regard conversions were held in. My comment was to illustrate that the JAA country of issue, rather than conversion or direct qualification, is seen as a factor by some people.
FWIW, I agree with your second post. I'm booked to do my FAA IR in June, JAA in July.