the increased frequency of SPV mining has occurred precisely b/c of the more consistently filled 1MB blocks and as a deviant defensive strategy being employed to navigate that congestion.

otherwise, you'd have to be arguing that what once wasn't a problem with blocks <1MB have to now be occurring precisely b/c 1MB is a magic number at which blocks are deemed "too big". what is the chances of that?

https://www.reddit.com/r/Bitcoin/comments/3c3emd/please_boycott_f2pool/css1oy1