The summer holiday flights were always going to be a struggle to fill because they went on sale too late - a lot of people would already have had their arrangements sorted out. The stats for May are very good though - average 172 pax per flight. June's figures aren't available.
Seguro seem to have got themselves sorted out in some respects though, Summer 09 is on sale already. Its pretty much status quo at the moment with Gran Canaria in for the summer holiday period again, though Majorca will operate all summer instead of stopping for the Scottish holidays in June/July.