Sorry Dosadi but Melissia is right, if you can not produce the evidence, it doesn't count for anything. Until we see official GW 40k global sales figures broken down by codex everything is pure hearsay.
Used to be that people would start with marines then move onto other races, I do wonder whether the overall focus on marines and the ability to collect and field the same army indefinitely (Apocalpse) has changed that dynamic.
Think I'll scrap my plans for a marine army now.