Not many people I know even acknowledge CR exists, much less put any worth in their 'testing'...

I rate them right up there with mythbusters in that their 'controlled' test are such that the test give them the results they want !

and it may be correct that cr has no up front advertisers,
but for years it's taken 'suggestions' from it's favorite mfg's-
thus their 'unbiased reviews' are usually slanted, just like with MOST media outlets...

I stopped paying attention to cr when I was in my early 20's...

The wife's 13 sport has not had a hiccup - but she does not load up her ipod or iphone with 10000 songs, nor use sync for blue tooth streaming...

as stated - the sync/mft issues with iphone Bluetooth connectivity is probably the majority of complaints --- and personally, we use it as a CAR, not a pc most of the time

(and you DO know iphone's use a proprietary (read non-standard) Bluetooth connection which things other than apple stuff don't play well with )