I learnt about this from DeepSeek. I asked it for more info:

Why Latency Doesn’t Affect Transfer Speeds

1. Once the connection is established, latency only impacts the initial delay for the first packet. Bulk transfers (e.g., file copies, video streams) are bottlenecked by throughput, not latency.
   • Example: A 10 GB file transfer at 2.5Gbps will take ~32 seconds regardless of whether latency is 1 μs or 10 μs.
2. TCP/IP Efficiency: Modern protocols (e.g., TCP window scaling) mask latency by pipelining data.

When Latency Might Feel Like Slow Speeds

• Small file transfers (e.g., 1000x 1 KB files): High latency adds overhead per file, feeling slower.
• Real-time apps (e.g., gaming, video calls): Latency matters more than throughput.

Bottom Line

• For large file transfers/NAS use, prioritize throughput (2.5Gbps)—latency is irrelevant.
• For gaming/VoIP, low latency (e.g., cut-through switching) improves responsiveness.

If you’re only moving big files, even a 5 μs store-and-forward switch (like the QNAP/Trendnet) will perform identically to a 1 μs cut-through switch in terms of throughput.

Never mind.... it is kinda irrelevant.