Thanks, that's interesting. Boardman's been quoted as saying Wiggins could do over 55, and interestingly rates a 55 effort with the current equipment and position as equivalent to a 56 using Superman. He also seemed to think 56 is potentially doable (or at least, not impossible), though that it would be very close unless the regulations change.
I must admit that hoping for a 56+ in June, while it would be great, is rather hopeful (or wishful) thinking on my part; at that speed and distance, the difficulty of adding 'just an extra k' can't be underestimated. I can't help feeling it'll come, though, and perhaps it isn't that far away if Wiggins is at 55 now. His 'Chris was 20 years ahead' only takes us to next year...