BS
I'm running openSuSE 11.2 on the laptop I'm posting this from. And some OS' have been able to handle larger sector sizes for quite a number of years.
Typically, the server class OS'; larger sector sizes were more efficient for large data sets (DB files). the 512B size was better for a larger number of smaller data sets (larger numbers of small files). It's been a trade off depending on the type of data you stored. But, that was back when HD's were measured in MB and early GB.
Good for you, and the other nineteen Linux home computers!
Seriously, together with all the other users of Linux-based OS, you make up just less than 1% of market share (not counting Mac OS users).