No its not obvious at normal size, but when zoomed in, the effect becomes apparent. The curves in O are replaced with straight lines, whilst the S looks like chunks have been bitten out of it.
The problem also becomes visible when these images are printed large, eg A0 size.
Vector images should be a perfect rendition of the original, regardless of the magnification. The true type font used for the phrase "Start typing here" below the images displays correctly at all zoom levels - the image text should do likewise.