Mmmmm..... whilst it's certainly been '20+change' for a lot of the time, they've also had a varying degree of headwind for that time. Their last day, with a helpful but not huge tailwind, was nearly 25kph average moving speed.
To me, the interesting aspect is that they are doing repeated very long days, in the 13-14 hour range mostly, but at least once up to 15.5 hours, without apparent issues. Given that they're doing shopping / cleaning / vlogging as well, it's pretty impressive that they are not - again, apparently - suffering much from that as yet. Amy was chased by a Slovakian micro-mutt yesterday: mild drama. Oh, and lifting a 25kg bike over that fallen tree looked less than fun too :-)