No, no, my internet has been neither throttled, nor slow.
The only potentially possible bottleneck related to my computer could have been hard disk read/write operations (as it was a usual 7200 rpm hdd, not an SSD). But! At a moment (when the downloaded blockchain data had not exceeded 32Gb) I tried to move the data directories to a fast USB 3.0 flash card (exactly to find what was the bottleneck).
The syncing did become a little bit faster indeed. But Not significantly!
Hmm, weird. Given that it was the earlier blocks, synchronization should have been pretty fast. If the synchronzation did become faster after you switch, it would mean that the node's speed wasn't the main bottleneck. What are your system's specs?
A solution that I use is to increase the dbcache. If you increase the dbcache, the synchronization would be exponentially faster. You do need a good amount of ram though.