R1b-10 = AMH. The AMH must be the ancestral HT of all M269. I belong to this group with the SNP U106.
I could agree that the AMH is ancestral or nearly so for L11. I'm not so certain that it would be ancestral for M269xL23 or L23xL51 - especially with their modal DYS393=12. At some point between M269 and L51 lies the difference between the old ht35 and ht15.