In my uneducated, non-SEO opinion......
#1 has always been the case
#2 also been a long standing notion... deep linking far more value than index swapping
#3 IMO pure speculation and unfounded in any reason
#4 IMO Pure speculation
#5 IMO Pure speculation
and the greatest pieces of information are missing..
#1!! - CONTENT CONTENT CONTENT! Good content will get your site listed above someone with 10,000 inbound links.(I dont mean pictures)
#2!! - RELEVANCY RELEVANCY RELEVANCY! linking nut and bolts to shirts fabrics aint gonna help ya.
DD
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