Yes. Russians took the design of the front sight from Germans.... That's all. All other parts and the way of operation is different... HK33 has more parts in common with Sturmgewehr 44 than AK and Sturmgewehr 44 has far more Russian solutions from SVT40...
PS. Quoting junk sites from Internet is just stupid too.... Especially blogs!!! Yellow press newspaper is like New York Times to those blogs.
PPS. From technological point, AK has more in common with Garand M1 rifle....

and that was officially recognized even back in Cold War time...