I don't think it will improve the handshake time. I do think it makes the handshake more consistent.
The TV in any system, the HDMI sink device, facilitates the successful handshake.
Better connectivity with all pin contacts = better results.
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Main HT <> 976 <> 7200 <> Ultra-X12 <> sapphire ST2 mkII RF/LF <> sapphire SC center
sapphire ST2 mkII SBR/SBL <> sapphire SS SR/SL <> Verizon/DVR <> Vizio M70Q7 <> Oppo UDP-203 <> Amazon 4k Fire TV